I don't thiiiink that it gets any more granular than that, either. Like I don't think you can spray gentler vs. harder, and there isn't really any reason you'd want to anyway. It's just "all the way down" vs. "partway down" being two discrete behaviours
And other than that every game I can think of just treats them as regular buttons
@Trinket basically every racer but the most arcadey use them. They're kind of essential for the genre.
A bunch of gamecube games use it for stuff that you wouldn't expect, like Melee having different levels of shield or Metroid Prime having strafe and lock-on. Astro-Bot has a bunch of stuff on there but that's also a demo of the adaptive triggers.