Virtualization doesn't work

Tried following a couple of guides a while ago to set up QEMU/KVM (virt-manager) on my atomic desktop (kinoite) but nothing seems to work. I’d like to know what is the most recommended and secure method for my setup and could someone help me in this endeavor?

Did you try with Flatpaks? I remember installing GNOME Boxes on my Silverblue machine some time ago, and it worked with no additional package layering needed.