So to conclude it would appear that Microsoft has done a fair to decent job of removing or at least reducing the additional overhead that Win11 places on these under powered handheld gaming systems.
Given that Asus (and others) do NOT provide native Linux support for their custom lighting (or anything for that matter) it really is no surprise that some features are non-functional on Bazzite.
This youtuber doesn't seem to really know their way around Linux super well, so this is less watching an expert do benchmarks and more watching someone semi-knowledgable stumble around a space for the first time.
Rather than using Bazzite, why not just use SteamOS? Bazzite was nice once upon a time when SteamOS support wasn't there for third-party devices, but since the Legion Go S release they've been doing TONS on that front. I have SteamOS on my original Ally Z1X, and it's great. Better than Bazzite or Windows.
Driver support for the Z2X may just not be there yet, which... fair. That'll come around. And while some people like the RGB lights, ai a dually disconnected them on my Ally, and couldn't care less if they don't work any longer.
The new Windows Full-screen doesnt do anything that a decent debloat of Windows doesn't already do, and numerous breakdowns/benchmarks have shown this. If you're already the sort to debloat your Windows install, it genuinely offers nothing performance wise.