Have you tried FreeRDP's Thincast Workstation (based on VirtualBox)?

http://www.freerdp.com/2019/02/20/hi-thincast-workstation

I know it's still in beta, but it was originally released two years ago and I'm still not able to boot ubuntu's mini.iso installation media in this graphics-optimized version of VirtualBox.

Interested also if anyone who has been able to get Thincast workstation to boot linux can compare it to a Hyper-V linux virtual machine connected to X410 through VSOCK:

https://x410.dev/cookbook/hyperv/using-x410-with-hyper-v-lin....

VSOCK could improve RDP latency since it should be faster than a localhost network socket.