Pixel Streaming + Nvidia Tesla T4

Did anyone get raytracing working. on AWS or GC
I have tested Unreal App with multiple streams and works fine on Amazon g4dn instance. It has Nvidia Tesla T4 . But ray tracing does not work.
Amazon also have “NVIDIA Quadro Virtual Workstation - Windows Server 2019” on its marketplace, I have tried this AMI and ray tracing seems to work, however with single stream CPU reached at 30% and stays there, even with no mouse move or click on browser end. During that session GPU stays less than 3%.
It seems the AMI and drivers utilizes software based encoder rather GPU hardware.
Any thoughts or idea?
I have also tried aws G4ad instance, it has AMD Radeon Pro V520. It does not even load Unreal App. Error I got “AMF not supported with a D3D12 renderer”