Hi,
To get the official Steam Deck seal of approval from Valve, I was told that I need to make an announcement that the game works on the Steam Deck. So: the game works on Steam Deck out of the box and it has never not worked on Steam Deck as far as I'm aware.
If you happen to find something to the contrary, let me know in the comments of this post, the Steam forum or on Discord (but Discord is probably the best place because I actually get notifications for that).
Peace,
Chris