Sometimes people open issues on the wrong repository, or possibly discussion of the issue shows that it'd better suit another repository. Or part of a repository is split into it's own. It'd be nice to be able to manage issues by moving them to other repositories.

Discussion on Zulip: https://radicle.zulipchat.com/#narrow/channel/369277-heartwood/topic/Moving.20issues.20betwen.20repositories.3F/near/540386372