I just got this laptop (Asus TUF A15 2021) today and it surprised me that everything works just fine out of the box on Vanilla Arch, except NVIDIA gpu I had to install it manually on battery power that’s why I enable powersaving mode. As for games performance it’s basically the same as windows no more no less.
My CPU got up to 93C and GPU got to 85C when use ultra settings and unlock framerate, I’m might look into undervolting in the future but I might have some problems because I never done that in Linux.