I've been self-hosting Gitea for years, and moved everything I had on GitHub off at the time of the Micro$oft takeover.

With Amsterdam[0], I've put it back on GitHub, but only as a mirror to increase visibility of the code. My erbosoft.com Git server will always remain the "source of truth" for the project.

[0] https://git.erbosoft.com/amy/amsterdam and https://github.com/amysoxcolo/amsterdam

Best of luck! I'm one of the project leads of Gitea, and if you run into any issues please feel free to hop into our chat:)