This is a a really good guide: "Virtualization on OpenBSD with VMM - configuration and walkthrough" (showing setup of Debian guest on OpenBSD host)
https://www.youtube.com/watch?v=sZnM-T6Os-s
https://www.youtube.com/watch?v=sZnM-T6Os-s
If you have a fediverse account, you can quote this note from your own instance. Search https://swarm.coiloptic.org/brettm/p/1773116561.482935 on your instance and quote it. (Note that quoting is not supported in Mastodon.)