Okay this is what I've gathered so far, someone please correct me, Lemmy is one type of instance on the fediverse when they were federated with beehaw they would see beehaw posts and vice versa. This is no longer the case, as far as I understand it you can still go to beehaw and create an account to browse it but you won't have access from your Lemmy account. IMHO this makes sense to me, it's like an entire sub going private.