just completed on Steam Deck

[Tat45]

with workarounds

map right trackpad to mouse and mouseclick temporarily to switch from keyboard/mouse to controller

map right trigger to E permanently because the game doesn't recognize a right trigger pull

[Bablos]

I did not understand your instructions, did you connect a mouse and keyboard to the deck?
Because on the deck itself in the game launcher, I couldn’t change the control to another button to make it work, the launcher simply does not perceive pressing other keys.