I can’t help but notice most (all I’ve seen anyway) of the federated projects are hosted on GitHub. GitLab is also not federated, but can be self hosted and has at least discussed it.
I am fully aware of my bias for GitLab over GitHub, but I still wonder why is those things? Is there a federated source hosting project?
Let’s not forget the EULA difference. GitHub will own your code to a greater degree than the alternatives, in order to feed their AI. I don’t think you can opt out?