I've tried playing pes 2020 with the controller on my phone and tablet connected via cable but I've been unsuccessful.
Is there any way to okay Android games on our Android devices using the stadia controller?
Using the Stadia app on android, click the controller icon, then follow the steps to link you controller to android.
I think you mean using the controller for regular Android games? It needs to be connected wired to do this, Android OS should recognize the Stadia controller as a normal HID-compliant device.
I've tried this without success