I had issues on virtual box as well. It will boot from the .iso and I get to to point of typing in “installer”, but that first menu that pops up after that, everything freezes and I have to restart the whole computer. Clock is still moving, but clicking and keyboard do nothing in any window. Using bspwm if that matters. Screenshot of virtual box settings is included. I’ve had plenty of other VM’s work without issue, so I don’t know what might be different.
Edit: I fired up another VM to make sure it wasn’t a kernel issue or anything like that. An existing VM with Pop_OS! starts and runs just fine.