Use block device from Linux VM under Apple Virtualization

[ovalhub]

I'm trying to setup a block device to be used by a Linux VM as an lvm partition for creating virtual hard drives for nested VMs managed by libvirt inside that Linux VM.
The block device is a thunderbolt 4 NVME SSD sitting under a Mac Mini M4.

• nested virtualization requires the Apple Virtualization backend
• Apple Virtualization supports passing a raw block device: https://developer.apple.com/documentation/virtualization/vzdiskblockdevicestoragedeviceattachment
• USB pass-thru, a possible alternative, requires the QEMU backend

I don't see a way with UTM on macos to pass a raw block device.
Am I missing something or is this not supported ? yet ?
I'm super excited about nested virtualization and I'm very pleased with the ease of setting it up so far. Thank you for a great product !