I've installed the 64Bit Linux Build on my Steam Deck, and am having an issue with DPAD input, All other inputs work fine, but the DPAD controls use Left and Right as Down and Up, while Up and Down do nothing, Rebinding the controls can only fix Left and Right, as Up and Down simply are not registering in the game it seems.
Edit -
On further play, it appears the triggers also are not being picked up by the game on the linux build, I suspect more buttons may not be working unfortunately.