A neat trick you can do with heavier games on … at least an OLED Deck (not sure if this is doable on the LCD version)…

You target 45 fps, min, lock the max frame rate at something like 45-50, then, use VRR set at a 1:2 ratio, so you get 45 fps at 90hz.

In many games, this generally, at least imo, ends you up with a smoother and potentially graphically higher quality than just targeting 60 fps / 60 hz.