Connecting Huawei P20 to Ps4 Controller is not working properly?

My Huawei P20 can be connected to my PS4 controller. But if I z.b. Fortnite wants to play on my phone, the control is completely wrong. I press R1 on my controller, but it will R2 "sent". That's because my phone PS4 stuff "converted". Do you have any solutions?

If you could change the fortnite settings on your phone there are people who prefer to shoot with R1

I have already tried everything, with my friend on his mobile phone, you can easily play with a Ps4 Controller Fortnite: / Have tried it with the developer mode on my phone, but I find nothing.