I think it should be feasible, if you can reach them. I’m done with github, who forced 2FA on my acct via email confirmation before my email address died. I’m not going to dance for Microsoft in order to give my attention and interaction to MS users.
In principle, I think if someone were to set up a TeX-specific forgejo/gitea instance, it would be attractive for LaTeX devs because they probably are not getting much benefit from be centralised on Github anyway. It was likely an arbitrary choice for them. If there were a LaTeX-themed git community, it would be attractive.