diff --git a/wp-includes/blocks.php b/wp-includes/blocks.php
index d632759b6a..1dc1e66230 100644
--- a/wp-includes/blocks.php
+++ b/wp-includes/blocks.php
@@ -764,6 +764,8 @@ function get_hooked_blocks() {
  * where it will inject the `theme` attribute into all Template Part blocks, and prepend the markup for
  * any blocks hooked `before` the given block and as its parent's `first_child`, respectively.
  *
+ * This function is meant for internal use only.
+ *
  * @since 6.4.0
  * @access private
  *
@@ -838,6 +840,8 @@ function make_before_block_visitor( $hooked_blocks, $context ) {
  * where it will append the markup for any blocks hooked `after` the given block and as its parent's
  * `last_child`, respectively.
  *
+ * This function is meant for internal use only.
+ *
  * @since 6.4.0
  * @access private
  *
@@ -1035,7 +1039,10 @@ function serialize_blocks( $blocks ) {
  * This function should be used when there is a need to modify the saved block, or to inject markup
  * into the return value. Prefer `serialize_block` when preparing a block to be saved to post content.
  *
+ * This function is meant for internal use only.
+ *
  * @since 6.4.0
+ * @access private
  *
  * @see serialize_block()
  *
@@ -1117,7 +1124,10 @@ function traverse_and_serialize_block( $block, $pre_callback = null, $post_callb
  * This function should be used when there is a need to modify the saved blocks, or to inject markup
  * into the return value. Prefer `serialize_blocks` when preparing blocks to be saved to post content.
  *
+ * This function is meant for internal use only.
+ *
  * @since 6.4.0
+ * @access private
  *
  * @see serialize_blocks()
  *
diff --git a/wp-includes/version.php b/wp-includes/version.php
index aeea4ac64c..a0198b2e4e 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.5-alpha-57065';
+$wp_version = '6.5-alpha-57066';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.