@bedfellow I recently added a community guide for how I installed the HassOS VM in Ubuntu Server (LTS 20.04).
One person seems to have some issues getting it running, but it worked well for me. If you feel like it, please give it a try (no harm done if it doesn’t work, I have the VM running, but still have my current setup running on the same machine, waiting to find time to migrate config). And please give feedback, whether it works for you or not.