i dont own the game but recently got a steam deck which I love because overall prefer handheld gaming so have been basing my game purchases on what the deck can play I can also play on pc not exclusively on pc.

so what can I expect does the game performance tank later in the game?

theirs literally no information on updated deck and updated game, I understand this type of game isnt typically played by steam deck users but surly theirs some.
cheers.