I have had to do this, well over a decade ago now, when working at a place that was a pretty big deal in the node world, and node was still pretty new. They helped us.

I would imagine GH would do the same if its a high enough profile issue.

Yep, we had to do this recently with Renovate, where we had too many releases, and new publishing hit a size limit on the registry, so we needed support to help us unpublish a load of old releases