If you don’t know Beehaw.org defederated from us but communities from there that have a copy on this instance are still visible to Us and we can post on them, they can’t see what we post or comment on those, and we can’t see what they post and comment over there.
they are gost communities hosted on this sv because how Lemmy works, and my question is what will be done about them.
My biggest curiosity is what would happen if they refederated with lemmy.world? Would all the posts and comments that had been separated and not updated for each instance sync up to be viewable from both sides?
No. Syncing never goes into the past. It only starts at present and moves forward.
no, but new posts would be shared again.