User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-37155350-20210115015428/@comment-30755067-20210115021056

It's just part of being an administrator. Only admins (and discussion moderators from what I recall) can see the deleted comments. I agree it can be upsetting to keep being reminded of these things, it may be best to through the ticket system and put in this request.