So when I go to https://lemmyverse.net/communities and search for let’s say Wordpress communities, I can see at least 3 there. When I search on my instance, so I can join and subscribe, I can’t see any. Why is that? The instances they are on are not defederated from my instace.
Put the !community@instance in the search bar then wait. It takes a while for the servers to negociate federation.