Hello,
I created a crosstie that bumps the Windows 10 version to 1909 and installs DKVK (Upstream) as a dependency.
Then I upgraded DKVK to 2.1 using the Crosstie but changing the tar.gz: https://github.com/doitsujin/dxvk/releases/tag/v2.1
Also installed d3d12 support DLLs: https://github.com/HansKristian-Work/vkd3d-proton/releases/tag/v2.8
Still, I get a "No GPU" message. I've seen that others with Wine Stagging made it work, and also with the Steam Deck.
Maybe if a Support Ninja can join we can have something working for the Open beta this weekend