Does that support extend to ARM? Not sure if it's still the case, but I recall that early Windows on ARM devices didn't have native Vulkan (and I believe OpenGL was translated to DirectX via ANGLE).
I haven't laid my hands on any ARM windows devices so I wouldn't be able to tell you. I'd be somewhat surprised if the newer snapdragon stuff doesn't have vulkan support because qcom supports vulkan first-class on its gpus. in fact, on newer android devices OpenGL support might already be implemented on top of vulkan, but don't quote me on that.
