You should check out Honey and Fire. The mental state of the MC and the other characters in the game is a pretty big theme. Good Intentions too, iirc. There’s also Betovering House!
So mental health as a theme definitely speaks to a lot of people here! Besides that, a lot of writers are pretty open about their mental health. I think the community in general is very supportive of making inclusive games.
I suppose an interesting question to ask would be, why is this theme becoming popular at this particular moment (all of the WIPs linked above are from 2018) instead of earlier or later? That’s not to say that the topic hasn’t been explored before now (Fallen Hero comes to mind, and there are probably others that I just haven’t played/seen), but it seems like the theme is more common now than it was a year ago.