I know gitea / forgejo will be a popular suggestion, either self-hosted or via something like Codeberg. Despite also being a GitHub user since 2010 and also "doomscrolling" issues for projects I am involved in, I do host a gitea for personal projects where I don't need the GitHub network effect. It works well and is surprisingly capable!

Having said that, I stumbled upon this curious blog post about a security issues in Forgejo: https://dustri.org/b/carrot-disclosure-forgejo.html