Virgl support in Bluefin VM Guests?

I am trying to figure out why a vanilla Fedora 41 VM (which I’ve just installed for testing) has working virgl (virtio-gpu) support whereas my preferred Bluefin VM doesn’t.

Has anyone done this before and gotten GPU acceleration to work properly? I am using Proxmox as a hypervisor, but that’s just KVM/QEMU under the hood, and both VMs have exactly the same settings, so… it’s either a kernel issue or a missing package (I’ve gone through most of the usual suspects in these instances, but the bottom line is that vanilla Fedora just works and Bluefin doesn’t).

I’ve posted a few notes up on Adventures in VDI - Tao of Mac, but so far the answer eludes me.

It seems to work just fine for my testing VMs? I dont think there is any package missing…