There is no information that I see that is recent. The font in whonix workstation kvm is too small and resolution too small.
I know whonix now does special things to prevent screen fingerprinting. Is there a way to make things larger without causing bad fingerprint problem?
Enable display scaling in virt-manager, disable automatic guest resizing, and then grow the window. Rather than increasing the resolution, it will just make everything bigger (and blurrier, but that’s unfortunately mostly unavoidable if you want the VM’s display bigger without the VM knowing that its display is bigger).
Added to the wiki just now:
KVM - Adjust Display Resolution