It is a table stakes missing feature.. for a long time. Clown seems appropriate, every project I've worked on in github we end up copying a github yml action to allow us to do this with one comment '/fast-forward', just is silly at this point that github doesn't natively support it.
And it doesn't even rebase and merge correctly with fast-forward if there it's a clean set of commits! https://github.com/orgs/community/discussions/5524