They did, it runs wonderfully on the Steam Machine natively now.

On the Machine I have been playing couch co-op Minecraft Dungeons II (streamed from my windows machine since it doesn’t currently support Linux). On the Frame I have finally been playing through Chants of Sennaar, I was also playing through Minecraft Dungeons I on the Frame (which isn’t technically Frame verified but I was able to get like 30 FPS at 1080p on that game).