Github fediverse alternative - iusearchlinux.fyi

I am already self-hosting a lot of things for 15+ years now, including git, but I am looking for a solution like Github that is federalized (not Gitlab or the like). I want people to be able to open issues, PRs, comment, fork or star without having to create an account on my server. Is there anything like that? I saw radicle.xyz but I am not sure if that is what I want. Basically a lightweight git+ActivityPub + web frontend is what I am looking for. I think. No CI/CD or other fancy features required.