Also wine is not an emulator, as its name clearly states, it makes things run natively so we should more generally talk about "PC gaming" there.
If you still want to make a distinction between games born for Windows and games born for Linux, then yes, those are not "Linux gaming".
So is the line you're drawing the emulation layer needed between ARM and x86? Or is it the difference between emulation and translation?
If this exact same fex+proton software was run on a snapdragon laptop under Ubuntu is that really that different? Do you count apps running under Java bytecode as emulation? Because that's a vast majority of android apps. The distinction between translation, native gaming, and emulation is ultimately kind of meaningless if you get a good experience out of it.
Android is technically Linux under the hood, so it can (and has) been making use of the improvements to Linux gaming.
If by "android gaming" you mean you want to see a world where games are published to the play store in addition to Steam and consoles, you should probably give up on that. The play store is too ridden with actual malware to make that a reality. Even if games got released there, people would complain that they aren't free because all of their other phone games are. If you want to play games on your phone with a Bluetooth controller and get a decent experience, it's already here.
Excuse me for sending an incredibly clickbaited YouTube video, I don't play AAA's since honestly IMO they're not as good as indies anyway. However, according to this cyberpunk runs (albeit I'm guessing that's on low) on newer phones: https://youtu.be/ACPXNADIjKw
I'm sure other AAAs from even just a few years ago could run fine. The only problem is that most android phones don't have enough storage for AAAs anyway. A "native" android release wouldn't change that.