Yep, at the moment, self-voicing is available in all of them. None of my games have disabled the built in Ren'Py accessibility features, but additional features like image descriptions, etc. vary from game to game.
Who is the Red Queen, Lachesis or Atropos, and The Final Prize is Soup all have image descriptions/captioning.
I'm not sure what you mean by fully accessible. As mentioned, I don't disable the built-in Ren'Py accessibility features, which encompass:
- Keyboard navigation
- Self voicing
- Font override (at minimum: DejaVu Sans and Open dyslexic)
- Font size/spacing toggles
- High contrast text options
If unfamiliar with Ren'Py, you can access the accessibility menu via the 'A' keyboard key.