Ps4 gamepad and Samsung galaxy s10

[pollet]

Hi.

Recently I buy the sgs10, with the sd versión and I Will try to play the dolphin emulator. My last Phone was an Sony Xperia premium that recognized the ps4 pad inmediatly. The problem is that with the sg I could recognise the ps4 gamepad but when I try to assign the buttons to the gamepad anithynk works. Must I download some apk or something special for use the ps4 gamepad?
What exactly is doing the other players for use an gamepad?

Thanks for the info.