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.
Careful with those laptops though, they run really hot. I have the same one and my dedicated GPU is broken, possibly from overheating but I will admit I can’t know for sure.
In college I had an aluminum body laptop that mostly sat in its dock. I cut a sheet of thermal gap fill to the size of two heatsinks and put one over the cpu and one over the gpu. It shaved off a few degrees