REQ: Optimal Steam Deck settings when playing docked on Samsung S90D TV for Retro Games.

I primarily use my Steam Deck OLED to play modern retro game collections and for emulation of classic games from the 20th century.

I've noticed that when I play retro games with the Deck connected to my Samsung S90D TV, my games aren't as sharp as they are on my PS5 Pro. Yes, I have doubled dipped on several retro collections. Are there any settings I should change on my Steam Deck when it is connected to my TV in order to get similar visual fidelity as my PS5 Pro for retro games? Thanks!