Have you not heard of the Steam Deck and Proton? Running MS APIs through a compatibility layer is the main goal for Linux gaming for the past few years, as it allows legacy games that had no hope in getting a Linux native port (or a terrible Linux port) to run in Linux, through the Proton Compatibility layer.
The apps I was using were running with DXVK, but due to a bug with intel iGPU driver which affects both Windows and Linux users, it didn’t work. A Intel Mesa update patched the bug, and my game worked better. When I moved back I was on an older driver and had to wait for it to be added in.
I wouldn’t worry too much about not knowing this. The steam deck is still relatively new and proton/dxvk is improving at such a blinding pace compared to the rest of Linux that my head is still spinning.
From my limited understanding, because of Arch’s rolling releases and Valve basing the steam deck on Arch. DXVK the compatibility layer for DX games to vulkan is managed by the distro. How this works is magic is still magic to me. I also think graphic drivers gets pushed on arch early too, since it’s a rolling release.
However I am in complete agreement, Arch isn’t beginner friendly, I personally like Manjaro and find it friendlier, but that’s like having a pet cat, and it’s a Bob cat. Sure it’s not a Lion, but it’s not a Kitty.