Well, I think the best source is likely to be this GitHub, description has a recommended settings thing:
TOTK-Mods-collection

SteamDeck Settings:

• use Github Pineapple EA Release builds
• use Update 1.1.2 + SteamsOS 3.5 if possible (make sure to delete shader cache if updating)
• Mods to use:

1. 60fpsBlackscreenfix
2. DynamixFPS++30_totk
3. Graphics - Disable LOD Quality Reduction
4. Graphics - Shadows - 512x - performance boost

• Yuzu settings under totk properties

1. CPU - Unsafe (leave all boxes checked)
2. Graphics -

• api: vulkan
• Use Disk pipline, Use asynch GPU, and Accelerate ASTC all enabled
• Window Adapting = Bilinear
• AA method = none

3. Adv Graphics

• Accuracy = normal

• Only items enabled on mine = Reactive flushing, use asynch shader block, and use vulkan pipeline cache