Valve just dropped Windows 11 Steam Machine drivers, and while I firmly believe stripping the cube of SteamOS is blasphemous, you can now do so with full hardware support. Dual-booting isn't a thing yet, so you will need to wipe your drive to turn the box into something closer to Xbox Project Helix.
Over at Valve's Windows Resources page, you'll now find Steam Machine drivers alongside existing Steam Deck OLED and LCD device controllers. Effectively, you've got downloads for graphics, Wi-Fi, Bluetooth, and the SD card slot to enable full functionality on Microsoft's operating system, which in theory should help it run like any other gaming PC.