

I think there’s two concurrent, but different definitions of the word Fediverse. One means, software that can speak the ActivityPub protocol. And the other one means, social media service which is able to interconnect between different websites.
The first one is more useful if you want to use it and know whether it connects you to your friends on Mastodon and the other big ones. The latter is the more technical definition and includes older protocols as well, as well as newer ones and alternative approaches to form a network in a certain way. I guess it’s the more correct one. But it doesn’t tell you a lot as a user. Maybe technically it can exchange your user statuses but nobody uses it so you can’t really do anything with it in reality. Or there’s two approaches and you were talking about a different manifestation than somebody else, and you’re both federated but not part of any compatible ecosystem.

I have a port forwarding without any tunnel to third parties and Wireguard.