No. It's super easy. It takes a few minutes per game if that. Games that support FSR4, like cyberpunk, it's a drag and drop operation. The difference FSR4 makes on handheld is
astounding. The clarity difference between FSR2/3 and 4 cannot be understated.
I don't have CP2077 installed right now but here's BG3 on my legion go. 1920x1200. Medium/high settings. 55-60fps. Both images are being slowly panned so FSR doesn't have a chance to resolve a static image. This is how the game appears in motion.
FSR2.2 Ultra Performance, internal resolution 640x400.
FSR4 Ultra Performance, internal resolution 640x400.
Good upscaling on a handheld is a massive, massive gamechanger.