@gringley's tip worked for installing, but on first boot of the full Monterey the guest crashes before I can select the Country for making a new user. Has anyone gotten past that step, and any tips?

I'm hosting on a Trashcan with 32G running Big Sur 11.16.1, Fusion 12.2.1

Oddly enough, I can get the same machine to run Monterey as a guest with VirtualBox. I'd expected that it would be the other way around.