Qubes OS: Templates

Windows support is definitely a second class feature in Qubes, across the board. I don't think many of the core developers actually use or particularly care about Windows.

It should run a standalone Windows VM just fine, though I've not played with that. I've not had any real need for Windows in years - and if you think you need it for games, go try a recent Ubuntu/Steam/Proton configuration and see how it works out.