If you're interested in protocols and interoperability that make the fediverse more than Mastodon and ActivityPub, SocialHub is where a lot of discussion and coordination have taken place over the years.
The future of SocialHub is however in question.
Up for vote and discussion is whether it should be locked and archived, run as is, or transitioned to a sustainable state of governance.
If this interests you, go now and make your voice heard.
Creating magic through evolution of the Fediverse. Running Ecko, a community-driven fork of Mastodon managed using the Collective Code Construction Contract (C4) by the Magic Stone Community. C4 is a protocol for asynchronous, non-blocking, distributed, problem-focused software development.