As WSL 2 is now available on arm, I tried to enable it.
Installation of Windows version 18985.1_PROFESSIONAL_ARM64_EN-US was almost without problems. (Only one time during the installation the screen went black and didn't come back, so after maybe an hour I pressed the power button for 30s and then the installation continued normally.)
Installing the "Windows Subsystem for Linux" compont via Control Panel ("Turn Windows features on or off") was no problem. However after enabling the "Virtual Machine Platform" component (which changes the bootmanager entry), I can no longer boot into Windows.
It just stays at this screen:

However, sometimes it gets to this screen:

As the msm8992 seems to support virtualization I hoped that this could possibly "just work" - but as it doesn't, I don't really know where to look for problems.
Is there something that I could try, or is this for some reason just impossible?