I would guess they are old post from before the ban, because going to a few different communities it seems all the posts stop about two weeks ago.
The weird thing is that some communities on that instance still showed a few posts. I thought those communities were just already dead.
I don't see any posts there. Does my account need to be tied to that instance to see them? Apposed to lemmy.ml?
On the play store I think it was called 'RIF Reddit is Fun'