There's a ujust script to set up virtualisation on Bazzite. ujust setup-virtualization in the terminal should get you going. Alongside the background stuff it sets up, it installs a GUI virtual machine manager.

I think there's some hidden complexity with immutable distros that most people ignore, I also had issues getting podman/docker to run properly there IIRC but dunno if its the same thing

I'm pretty sure if you use bazzite-dx you get the virtualization setup as a ujust set-up script

There is a ujust script for enabling KVM.

I forget exactly how I had to do it. If there's anything need beyond ujust, if you search for it, you'll find solutions (if nothing for Bazzite, try "silverblue" instead in your search as it'll likely be the same solution)