It's currently documented for Qubes-Whonix, but not for KVM.
It would be good as sanity test that Whonix is leak free today and stays leak free as Whonix developers (future firewall changes T509, IPv6, etc.)
Either as a separate wiki page. Then we could transform many shared contents into wiki templates and re-use them on both pages.
Or on the same wiki page. Then we would work with expand buttons where Qubes, VirtualBox and KVM instructions differ.