My apologies, when I said released I meant released for public testing / playing (ie, it's current state).
I've played a little with keyboard and mouse as well as a controller (using community settings) and currently it very much feels like it would be difficult to play with a controller (I'd like to stress I'm hoping and happy to be proven wrong about that further down the line).
My surprise was that Valve have brought about a game like Deadlock which currently (to me) feels very much like a keyboard and mouse only game. Again, looking forward to that potentially changing.
I didn't mean to sound like I was complaining, I was trying to express my surprise.
I said in my comment I'd used a controller to play on PC. When I played Deadlock (a week or two ago) the controls were most certainly not configured (at least not via PC + wired controller) hense the community keybinds.
The only thing I can suggest is; either there has been an update in the last week which has added support or it's configured for the Deck but not PC+controller yet.