WRT transferring issues, it looks like GitHub does support it.
https://docs.github.com/en/free-pro-team@latest/github/managing-your-work-on-github/transferring-an-issue-to-another-repository
In reply to Re^5: rt.cpan to close, 01/03/2021 by swl in thread rt.cpan to close, 01/03/2021 by marto