If the spirit of the fediverse is to spread everything across small instances, then i think it would be really important to make communities, especially niche communities, easier to discover across instances. Since it is not planned to crawl federated instances community catalog, i think instance admins, or maybe even the lemmy software itself, should point more obvious to services like https://lemmyverse.net/communities to search for communities instead of the lemmy (or mbin, piefed) internal search. It's been a while since i have seen someone talk about these community crawler services.

Instances that don't federate a remote community won't even list this community in the user profile of a moderator.