I modified the Steam controller layout. I've exported it as a community layout called "Steam Deck Lucius Demake FIX" which anyone can used.

In game, one must go in the inputs configuration screen and modify the keyboard controls. (The game's keyboard and controller configurations are in the same place, so I used the controller layout as reference).

It is simpler than it sounds if you use this community layout, just change they keyboard inputs in-game.