I think that it has to do with lemmmy and instances. When no one has searched for a specific community from your home instance this community isn’t known by your instance. To find a niche community that wasn’t known by your instance you must use the exact name of this community (like !asklemmy for exemple) to find thoses exact names and brosse all communities you can use lemmyverse.net
are some communities on this Lemmy thing inaccesible by searching? If so, how to find them?
I can not believe that there is, for example, no furry communities here - yet there are none in search results…...