Since a lot of these questions are popping up on other instances I figured I’d say go to:

https://browse.feddit.de

Then add the community by going into search and searching !communitie@server.com

Takes up to about 10 seconds, but then it’ll pop up if no one on this instance has searched for it before. The “All” content contains everything that folks have to subbed to before on this instance, so it may also have some stuff you’re looking for.