Yes but on Earth every project needs a canonical main branch. Most also need a way to manage and review changes to that branch that all project members have direct access to.

Gitea (and its popular fork, Forgejo) are very lightweight. You can easily stand up an instance on a cheap VPS.

It's on the project to decide which is canonical and export a read only accessible version. Change review only requires a communication medium (the patches are mostly plain text) and that can be done in a lot of way. As for merging those changes, it's an organizational issue.