where can I find a sample code of WDDM 2.x?

Below link from MSDN gives a sample of WDDM 1.x, but where can anyone please tell me a available sample code of WDDM 2.x? Thanks alot!
https://docs.microsoft.com/en-us/windows-hardware/drivers/samples/video-driver-samples

AFAIK there are no public WDDM samples from microsoft for anything other than the KMDOD WDDM 1.x driver. You might learn something from various open source virtualization projects, virtualbox for example. The big hardware graphics companies certainly are not making their windows drivers open source.