So, now instances are hosting posts and comments that a user deleted on another instance. But that user has no way to ‘re-delete’ the OP and comment.
Now what?
I guess the instances might cross check the existence of OPs and comments on other instances, but the longer this problem exists, the larger the problem.
No, this is the most serious lacking feature IMO.
But you could of course simply register your username at multiple instances and subscribe to the same communities. As there’s no ‘followers’ like on Mastodon, the effect is the same.