Coming in #Drupal 10.1 - https://www.drupal.org/node/3319245 - Block content entities now have a revision UI. Oh and if you notice the breadcrumbs look naff, help us improve them in https://www.drupal.org/project/drupal/issues/2317981- credit to @dpi for driving this and the APIs behind it along
Block Content now provides a UI for viewing, reverting and deleting revisions

It is now possible to view, revert and delete block content revisions. Block Content is the first entity to use the public facing revision UI. Revision history Revision revert form Revision delete form With this change, there are now also new granular permissions for granting permission to each the history page and revert and delete forms for block content entities. Users

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