Anyone can use controller on mobile port?

First time post here. I am happy to see this game finally ported into phone and I downloaded it. The issue is while the option part has configuration for controller, the game doesn't react to my controller beside configuring controller part. I thought that's my controller part so I did a test on Fortnite mobile app but it works fine.

Hate it that in some levels like holding pegwin for 25s mobile layout has massive limitations so I still need to grab my controller. Anyone successfully connect controller to the game via Bluetooth?

BTW my phone is Honor X9a and I'm using ps4 controller.