Playing Poker has nothing to do with the emotional part of the Brain, It is a logical game that can be Won using the Cognitive and problem solving part of the Brain, that deals with Other things like reasoning and mathematics.
Depression is purely Emotional and I suppose for some people it could help them win, as their Emotions are already showing a negative Poker Face that could mislead opponents reading abilities.
I have been a Victim of depression ever since the Covid Pandemic, and even now after things have got back to "normal" I find it hard to be interested in getting back to my Weekly games in my Local Pub, or even playing on-line like I used to,
I do play the occasional 9 player sit and go but only to keep my rewards chest active, and that is On-line, so my depression doesn't show anyway, I have not noticed any difference in my playing abilities and still manage to make the money bubble (top 3) in most of the games I play, even winning the odd game now and again.
So I would have to say Yes! You can still Win at Poker while you are Depressed! The question should be do you really care if you Win or lose?
I know I don't give a Damn, One way or the other,