Just got my steamdeck, need advice for BG3 on heroic launcher

I just got my steamdeck OLED (1 To version) and I already have Baldur's Gate 3 on GoG. I was trying to launch it on heroic launcher today but it seems very clunky while it looks very easy for people using it on steam.

I let everything vanilla on Heroic Launcher.

These are my settings: -BG3 is running in Fullscreen via Dx11. 16:9 with a resolution of 1280x720.

Overall is low. Models in High and Textures in Ultra. (As I got on a YouTube video launching it through steam).

FSR 2.2 in quality mode, I don't really know where to put the sharpness cursor tho. Thanks for your help in advance !