I’ve begun to wonder about this question. There’s nothing implied in the existence of the fediverse that it will include every site, and there’s nothing implied in the existence of every non-fediverse site which would stop them from forming their own fediverse. One could technically say email providers have already achieved this, though this only really applies to email providers which doesn’t make it as useful as the fediverse we know and love. Are there actually other fediverses out there?
I can posts from beehaw on .ee
Do you get replies from anyone on Beehaw? Or is it only other people from lemmy.ee?
Beehaw defederates from most other instances. That means users on other instances can see and comment on their content, but the only users that can see those interactions are other users from the same instance.