Posibility to play with keyboard and controller in co couch mode

Game allow to configure as different input keyboard + mouse and as second input microsoft xbox elite controller, but when game started it fully blocked the game with message that keyboard and mouse deactivated.

System: steam deck
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So two items from my side:
1) provide some sort of exit button because from this screen you can only exit with alt+f4
2) activate possibilities to use as first input keyboard + mouse and second input xbox controller in game session not only in menu.