Nubia RedMagic Mobile Gaming Controller for Android/iPhone 15 Series (USB-C) with Hall Effect Joysticks, Gaming Pad RGB Phone Game Controller Support PS Remote Play, PlayStation, Steam Link

This controller for mobile phone is pretty good for such a costly price of $99. The way it shape like a XBox and PlayStation controllers make it comfortable for people that are used to console controllers. The multiple buttons on the controller actually helps with having different play styles. Even the R4 and L4 button on the back handle is really comfortable. These two buttons even give players the advantage when assigning different buttons on their mobile game. I guess the only downside to this controller is the connectivity. 

When you connect your mobile phone with the controller, it will sometimes connect and not connect, making the player having to manually activate the connectivity through the existing program for controllers on their mobile phone. Also, I do believe there is a guide on how to assign the R4 and L4 buttons on the guide book that come along with the controller.