WordPress/wp-includes/blocks/media-text/editor.css

.wp-block-media-text__media{
  position:relative;
}
.wp-block-media-text__media.is-transient img{
  opacity:.3;
}
.wp-block-media-text__media .components-spinner{
  left:50%;
  margin-left:-9px;
  margin-top:-9px;
  position:absolute;
  top:50%;
}

.wp-block-media-text .__resizable_base__{
  grid-column:1 / span 2;
  grid-row:2;
}

.wp-block-media-text .editor-media-container__resizer{
  width:100% !important;
}

.wp-block-media-text.is-image-fill .editor-media-container__resizer{
  height:100% !important;
}

.wp-block-media-text>.block-editor-block-list__layout>.block-editor-block-list__block{
  max-width:unset;
}