Serval compatibility with triggers

So I have a question, Recently I played Blasphemous on Steam with my Serval gamepad, it worked flawlessly, I didn't do nothing, just plugged in, triggers worked fine. On the Windows game controller settings, triggers are'nt recognized, and in many other games don't recognize it too. So whats the difference? Why in some games (i'm assuming there's others) the triggers work and in others don't? It has anything to do with xinput and dinput?