Hi, I managed to assign SR-IOV VFs to VM using Intel's WIP driver mentioned above, though I'm testing with Arch Linux.
More about it here:
https://www.reddit.com/r/VFIO/comments/xoeika/sriov_on_intel_uhd_graphics_770_xe_12th_gen/
https://github.com/strongtz/i915-sriov-dkms