Tried both. Configuring in-game, the game had zero clue the buttons seemed to exist. Which makes since it’s an emulated gamepad.
I did try assigning via the controller settings key inputs I could then bind but using any non controller type input would flip the game into thinking it was mouse + keyboard. I’ve ran into this behavior a few times on the deck when adjusting the volume so this may end up being something that gets smoothed out. The game isn’t technically released yet so I don’t expect everything to be 100% smooth out of the gate.