How do I load a Media entity from a File entity?
Example - if your File entity is loaded in a variable named $file, and the field name on the Media entity is field_media_image:

$media_entities = \Drupal::entityTypeManager()-&gt;getStorage('media')-&gt;loadByProperties([
  'field_media_image' =&gt; $file-&gt;id(),
]);

$media_entity = is_array($media_entities) ? array_pop($media_entities) : NULL;


Note1 : If the File object belongs to more than a single Media entity, you will need to loop through $media_entities to find the one you want.

Note 2: $media_entity will either contain the Media entity the File entity belongs to, or be NULL if the File entity doesn't belong to a Media entity.