Funny you mention the crash. I wanted to create a new Monterey Beta 12.1 VM, so I thought lets save a few steps by creating a USB installer from the Install Monterey Beta file. This crashed for me as you noted so I had to create a normal 12.0.1 VM, then download and install the Apple beta package, then get the Monterey Beta installer and run it to get the new VM on beta 12.1. No idea what causes the crash, but for me it only happened with the beta 12.1 not the release 12.0.1.
