Ryzen 5700G no /dev/dri

I've done a bit of swapping around of hardware in recent months and thought i'd better get my iGPU (no dGPU any more on this box) transcoding back up and running again...

but I don't seem to have a /dev/dri folder to pass through to the jellyfin docker container!

lspci knows about the iGPU

0b:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cezanne [Radeon Vega Series / Radeon Vega Mobile Series] (rev c8) (prog-if 00 [VGA controller])
        Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Device 1636
        Flags: bus master, fast devsel, latency 0, IRQ 4, IOMMU group 16
        Memory at d0000000 (64-bit, prefetchable) [size=256M]
        Memory at e0000000 (64-bit, prefetchable) [size=2M]
        I/O ports at f000 [size=256]
        Memory at fcb00000 (32-bit, non-prefetchable) [size=512K]
        Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
        Capabilities: [48] Vendor Specific Information: Len=08 <?>
        Capabilities: [50] Power Management version 3
        Capabilities: [64] Express Legacy Endpoint, IntMsgNum 0
        Capabilities: [a0] MSI: Enable- Count=1/4 Maskable- 64bit+
        Capabilities: [c0] MSI-X: Enable- Count=4 Masked-
        Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
        Capabilities: [270] Secondary PCI Express
        Capabilities: [2b0] Address Translation Service (ATS)
        Capabilities: [2c0] Page Request Interface (PRI)
        Capabilities: [2d0] Process Address Space ID (PASID)
        Capabilities: [400] Data Link Feature <?>
        Capabilities: [410] Physical Layer 16.0 GT/s <?>
        Capabilities: [440] Lane Margining at the Receiver
        Kernel driver in use: vfio-pci
        Kernel modules: amdgpu

radeontop gives a couple of errors, but still launches.

root@beast:/dev# radeontop
Failed to find DRM devices: error 2 (No such file or directory)
Failed to open DRM node, no VRAM support.
Collecting data, please wait....

Any bright ideas?

(my money's on my own stupidity carrying some previous config through somewhere along the line)

beast-diagnostics-20240922-1526.zip