As far as I know, nothing has changed yet for src.fedoraproject.org. Only repos on pagure.io have been moved to a new git forge. IIUC, an entirely separate forge instance will be created when the Fedora Infra team is ready to start moving things from src.fedoraproject.org.
The admin room on Matrix might be a better place to find someone who really knows what the state of things is and what is being planned.
This is the maintainer just being busy. I’d use the “needinfo” flag in the bug to poke them again about it. It has nothing to do with the migration to forge. While src.fp.o will also be forge based in the future, a plan for this has not yet been announced.