You can host your own git repos too, if you want.

Yeah, I'm actually doing that with Gitea: https://about.gitea.com/

Some people went with the forgejo fork: https://forgejo.org/ though Gitea itself was a fork of Gogs, if I remember correctly: https://gogs.io/

I also ran GitLab in the past: https://about.gitlab.com/ but keeping it updated and giving it enough resources for it to be happy was troublesome.

There's also GitBucket: https://gitbucket.github.io/ and some other platforms, though those tend to be a little bit more niche.

Either way, there's lots of nice options out there, albeit I'd still have to admit that just using GitHub or cloud GitLab version would be easier for most folks. Convenience and all.