Essentially as long as your instance isn’t actively defederated from a given instance, you can typically join your instances “mirror” of that community.
Say you wanted to join cats on sh.itjust.works… you can open your instances search and paste [email protected] into your search
Because currently lemmy doesn’t substitute links to rewrite them from your own community.
Eg. [email protected] would refer to https://lemmy.one/c/[email protected] From your instance. If people don’t link correctly though it’ll direct to https://sh.itjust.works/c/cats which you wouldn’t be able to join
Essentially as long as your instance isn’t actively defederated from a given instance, you can typically join your instances “mirror” of that community.
Say you wanted to join cats on sh.itjust.works… you can open your instances search and paste [email protected] into your search