Xen prevents modifying ACPI data.

It also passes obvious "Xen emulated drive", and similar for all hardware interfaces.

Passes CPUID.

Can't stop any of this with Qubes/Xen. But is trivial with Proxmox/KVM.

Honestly, I wish there was a Qubes/KVM variant. It would fix every complaint, and enable running potentially malicious software (MS windows) and lie to it regarding hardware interfaces.