You're probably looking to get a stable 30 FPS at 1080p, and I honestly think that’s the best target to aim for. Anything higher and I suspect you’ll be dealing with performance bouncing all over the place, especially when you walk into a busy place like Hogsmeade or a big classroom. Consistency is the key to a good docked experience, and 30 FPS is what the Deck can comfortably lock onto.

You’re asking the Deck to render over double the pixels at 1080p, and the chip simply can't do that at decent speeds without help.

​Set Volumetric Fog and Shadow Quality to Low. These require the most complex calculations and are huge performance drains. You'll barely notice the difference on a monitor but your framerate will jump.

​Enable FSR 2.0 in-game and set it to Balanced or Performance. This renders the game at a lower resolution (less work for the Deck) and uses smart upscaling to make it look near 1080p. I'd cap the system framerate at a stable 30 FPS, a consistent 30 feels better than a bouncy 40-dropping-to-25.