Yes, the !gaming-communities already federated to your home server.
There is most likely a lot of !gaming-communities you’re not seeing.
Make a dummy account at a different instance, create a new community, search for it on your home server and see if it shows up or if you have to search for the community with an URL and pull it to your instance.
Interesting, I’ll check it out once it’s back up.
If it’s automatically connect to “friends-of-friends” instances and subscribe to all communities, that’s a great idea! It would basically crawl the known network as long as there was a single link between instances. It would particularly be a boon to smaller instances that would be much easier to connect to.
If it’s a regular instance ran as a community server with the aim of manually subscribing to everything as an emergency solution to this problem then eh… I literally did that a year ago with like 20 instances. I think that’s not feasible, or even worse - exclusionary without intending. If it’s all manual and everybody goes there because we think it’s all-encompassing… If one is not on the list they don’t exist to the world.