Will this push even more games into Linux?

Well, linux already runs perfectly fine on ARM chips, so it probably won't matter much. The real bottleneck is getting game studios to build arm releases of their code, which by itself is easy in normal circumstances but they often have third party code that doesn't have ports or are abandoned or hidden behind NDA's (networking code, sound processing, custom tooling etc). So ARM and Linux are not the blocking factor at all and I'm willing to bet most of the engineers working on game engines have ported them to linux/arm for fun already, they just can't release for various reasons above.

So if anything, we need to push more game studios to use open source dependencies which will make porting easier.

Linux is terrible on ARM, I don't agree that it runs perfectly fine at all. Try loading Ubuntu onto a Snapdragon laptop for example. It works but lots of issues eg sound, webcam quality, etc

Most games are Windows games running on Proton.

What would push more games would be Valve actually making it worthwhile to natively target Linux.