diff --git a/wp-admin/includes/post.php b/wp-admin/includes/post.php
index 0faf51d412..78029fd456 100644
--- a/wp-admin/includes/post.php
+++ b/wp-admin/includes/post.php
@@ -685,12 +685,15 @@ function get_default_post_to_edit( $post_type = 'post', $create_in_db = false )
 				'post_title'  => __( 'Auto Draft' ),
 				'post_type'   => $post_type,
 				'post_status' => 'auto-draft',
-			)
+			),
+			false,
+			true
 		);
 		$post    = get_post( $post_id );
 		if ( current_theme_supports( 'post-formats' ) && post_type_supports( $post->post_type, 'post-formats' ) && get_option( 'default_post_format' ) ) {
 			set_post_format( $post, get_option( 'default_post_format' ) );
 		}
+		wp_after_insert_post( $post, false );
 
 		// Schedule auto-draft cleanup.
 		if ( ! wp_next_scheduled( 'wp_scheduled_auto_draft_delete' ) ) {
diff --git a/wp-includes/class-wp-customize-manager.php b/wp-includes/class-wp-customize-manager.php
index 832cf2f6fd..88a8128acd 100644
--- a/wp-includes/class-wp-customize-manager.php
+++ b/wp-includes/class-wp-customize-manager.php
@@ -3105,6 +3105,8 @@ final class WP_Customize_Manager {
 		/** This action is documented in wp-includes/post.php */
 		do_action( 'wp_insert_post', $post->ID, $post, true );
 
+		wp_after_insert_post( $post, true );
+
 		wp_trash_post_comments( $post_id );
 
 		/** This action is documented in wp-includes/post.php */
diff --git a/wp-includes/post.php b/wp-includes/post.php
index ee1c9caea9..2042342eea 100644
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -3645,10 +3645,11 @@ function wp_get_recent_posts( $args = array(), $output = ARRAY_A ) {
  *     @type array  $tax_input             Array of taxonomy terms keyed by their taxonomy name. Default empty.
  *     @type array  $meta_input            Array of post meta values keyed by their post meta key. Default empty.
  * }
- * @param bool  $wp_error Optional. Whether to return a WP_Error on failure. Default false.
+ * @param bool  $wp_error         Optional. Whether to return a WP_Error on failure. Default false.
+ * @param bool  $fire_after_hooks Whether to fire the after insert hooks. Default true.
  * @return int|WP_Error The post ID on success. The value 0 or WP_Error on failure.
  */
-function wp_insert_post( $postarr, $wp_error = false ) {
+function wp_insert_post( $postarr, $wp_error = false, $fire_after_hooks = true ) {
 	global $wpdb;
 
 	// Capture original pre-sanitized array for passing into filters.
@@ -4310,6 +4311,10 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 	 */
 	do_action( 'wp_insert_post', $post_ID, $post, $update );
 
+	if ( $fire_after_hooks ) {
+		wp_after_insert_post( $post, $update );
+	}
+
 	return $post_ID;
 }
 
@@ -4321,12 +4326,13 @@ function wp_insert_post( $postarr, $wp_error = false ) {
  *
  * @since 1.0.0
  *
- * @param array|object $postarr  Optional. Post data. Arrays are expected to be escaped,
- *                               objects are not. Default array.
- * @param bool         $wp_error Optional. Allow return of WP_Error on failure. Default false.
+ * @param array|object $postarr          Optional. Post data. Arrays are expected to be escaped,
+ *                                       objects are not. Default array.
+ * @param bool         $wp_error         Optional. Allow return of WP_Error on failure. Default false.
+ * @param bool         $fire_after_hooks Whether to fire the after insert hooks. Default true.
  * @return int|WP_Error The post ID on success. The value 0 or WP_Error on failure.
  */
-function wp_update_post( $postarr = array(), $wp_error = false ) {
+function wp_update_post( $postarr = array(), $wp_error = false, $fire_after_hooks = true ) {
 	if ( is_object( $postarr ) ) {
 		// Non-escaped post was passed.
 		$postarr = get_object_vars( $postarr );
@@ -4391,7 +4397,7 @@ function wp_update_post( $postarr = array(), $wp_error = false ) {
 		}
 	}
 
-	return wp_insert_post( $postarr, $wp_error );
+	return wp_insert_post( $postarr, $wp_error, $fire_after_hooks );
 }
 
 /**
@@ -4467,6 +4473,8 @@ function wp_publish_post( $post ) {
 
 	/** This action is documented in wp-includes/post.php */
 	do_action( 'wp_insert_post', $post->ID, $post, true );
+
+	wp_after_insert_post( $post, true );
 }
 
 /**
@@ -4916,6 +4924,34 @@ function wp_transition_post_status( $new_status, $old_status, $post ) {
 	do_action( "{$new_status}_{$post->post_type}", $post->ID, $post );
 }
 
+/**
+ * Fires actions after a post, its terms and meta data has been saved.
+ *
+ * @since 5.6.0
+ *
+ * @param int|WP_Post $post   The post ID or object that has been saved.
+ * @param bool        $update Whether this is an existing post being updated.
+ */
+function wp_after_insert_post( $post, $update ) {
+	$post = get_post( $post );
+	if ( ! $post ) {
+		return;
+	}
+
+	$post_id = $post->ID;
+
+	/**
+	 * Fires once a post, its terms and meta data has been saved.
+	 *
+	 * @since 5.6.0
+	 *
+	 * @param int     $post_id Post ID.
+	 * @param WP_Post $post    Post object.
+	 * @param bool    $update  Whether this is an existing post being updated.
+	 */
+	do_action( 'wp_after_insert_post', $post_id, $post, $update );
+}
+
 //
 // Comment, trackback, and pingback functions.
 //
@@ -5789,13 +5825,14 @@ function is_local_attachment( $url ) {
  *
  * @see wp_insert_post()
  *
- * @param string|array $args     Arguments for inserting an attachment.
- * @param string       $file     Optional. Filename.
- * @param int          $parent   Optional. Parent post ID.
- * @param bool         $wp_error Optional. Whether to return a WP_Error on failure. Default false.
+ * @param string|array $args             Arguments for inserting an attachment.
+ * @param string       $file             Optional. Filename.
+ * @param int          $parent           Optional. Parent post ID.
+ * @param bool         $wp_error         Optional. Whether to return a WP_Error on failure. Default false.
+ * @param bool         $fire_after_hooks Whether to fire the after insert hooks. Default true.
  * @return int|WP_Error The attachment ID on success. The value 0 or WP_Error on failure.
  */
-function wp_insert_attachment( $args, $file = false, $parent = 0, $wp_error = false ) {
+function wp_insert_attachment( $args, $file = false, $parent = 0, $wp_error = false, $fire_after_hooks = true ) {
 	$defaults = array(
 		'file'        => $file,
 		'post_parent' => 0,
@@ -5809,7 +5846,7 @@ function wp_insert_attachment( $args, $file = false, $parent = 0, $wp_error = fa
 
 	$data['post_type'] = 'attachment';
 
-	return wp_insert_post( $data, $wp_error );
+	return wp_insert_post( $data, $wp_error, $fire_after_hooks );
 }
 
 /**
diff --git a/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php b/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php
index 58aaa37a81..fcbf70f501 100644
--- a/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php
+++ b/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php
@@ -191,6 +191,8 @@ class WP_REST_Attachments_Controller extends WP_REST_Posts_Controller {
 		 */
 		do_action( 'rest_after_insert_attachment', $attachment, $request, true );
 
+		wp_after_insert_post( $attachment, false );
+
 		if ( defined( 'REST_REQUEST' ) && REST_REQUEST ) {
 			// Set a custom header with the attachment_id.
 			// Used by the browser/client to resume creating image sub-sizes after a PHP fatal error.
@@ -270,7 +272,7 @@ class WP_REST_Attachments_Controller extends WP_REST_Posts_Controller {
 		}
 
 		// $post_parent is inherited from $attachment['post_parent'].
-		$id = wp_insert_attachment( wp_slash( (array) $attachment ), $file, 0, true );
+		$id = wp_insert_attachment( wp_slash( (array) $attachment ), $file, 0, true, false );
 
 		if ( is_wp_error( $id ) ) {
 			if ( 'db_update_error' === $id->get_error_code() ) {
@@ -345,6 +347,8 @@ class WP_REST_Attachments_Controller extends WP_REST_Posts_Controller {
 		/** This action is documented in wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php */
 		do_action( 'rest_after_insert_attachment', $attachment, $request, false );
 
+		wp_after_insert_post( $attachment, true );
+
 		$response = $this->prepare_item_for_response( $attachment, $request );
 		$response = rest_ensure_response( $response );
 
diff --git a/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php b/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
index 76a924cf96..06db540af2 100644
--- a/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
+++ b/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
@@ -591,7 +591,7 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 
 		$prepared_post->post_type = $this->post_type;
 
-		$post_id = wp_insert_post( wp_slash( (array) $prepared_post ), true );
+		$post_id = wp_insert_post( wp_slash( (array) $prepared_post ), true, false );
 
 		if ( is_wp_error( $post_id ) ) {
 
@@ -677,6 +677,8 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 		 */
 		do_action( "rest_after_insert_{$this->post_type}", $post, $request, true );
 
+		wp_after_insert_post( $post, false );
+
 		$response = $this->prepare_item_for_response( $post, $request );
 		$response = rest_ensure_response( $response );
 
@@ -758,7 +760,7 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 		}
 
 		// Convert the post object to an array, otherwise wp_update_post() will expect non-escaped input.
-		$post_id = wp_update_post( wp_slash( (array) $post ), true );
+		$post_id = wp_update_post( wp_slash( (array) $post ), true, false );
 
 		if ( is_wp_error( $post_id ) ) {
 			if ( 'db_update_error' === $post_id->get_error_code() ) {
@@ -828,6 +830,8 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 		/** This action is documented in wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php */
 		do_action( "rest_after_insert_{$this->post_type}", $post, $request, false );
 
+		wp_after_insert_post( $post, true );
+
 		$response = $this->prepare_item_for_response( $post, $request );
 
 		return rest_ensure_response( $response );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 1bec5fdb76..89bfbfa259 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.6-alpha-49171';
+$wp_version = '5.6-alpha-49172';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.