Why do apps not detect the L2 and R2 triggers from my controller?

[SaWce Lyf3]

I am using my bluetooth controller on my android device and everything works perfectly fine except that apps will not detect the L2 and R2 triggers. I also know that the triggers arent the problem because I used an app to test the controller keybinds and they were detected there but no where else... Anything will help!

 

[Rukbat]

[Moved to Ask a Question for better exposure. Android Apps is for app developers.]

Probably because the particular apps weren't written to accept inputs from the controller. (Maybe they all use the same gaming engine? Most game developers use an existing gaming engine, they don't develop their own.) Email the individual developers.