I was trying to setup multiple mirrors for myself as well, but both Codeberg and even sr.ht (sourcehut) makes it hard to just setup a simple mirror.. Why do they make it so hard? I now just went for GitLab instead (https://gitlab.melroy.org/melroy/mbin which is now a mirror at least). But even then, it required GitLab Premium to have a repo pull mirror, luckily I have my solution for that: https://blog.melroy.org/2021/gitlab-pull-from-remote-repo/