I believe these gpus dont have direct hdmi/DisplayPort outputs, so at the very least its tricky to even run a game on them, I guess you need to run the game in a VM or so?
Correct! I added an Nvidia T400 to the rig recently, as it gives me 4x Display ports, and a whole extra 2GB VRAM!
you can just force a edid in xorg and run sunshine (streaming)
Copying between GPUs is a thing, that's how integrated/discrete GPU switching works. So if the drivers provide full vulkan support then rendering on the nvidia and copying to another GPU with outputs could work. And it's an ARM CPU, so to run most games you need emulation (Wine+FEX), but Valve has been polishing that for their steamframe... so maybe?
People have gotten games to run on a DGX Spark, which is somewhat similar (GB10 instead of GH200)