Even though the PlayStation 5 DualSense controller is not usually compatible with the PS4, there are a couple of workarounds ...
You can easily connect a PS4 controller to ROG Phone 3 using Bluetooth. This allows you to enjoy playing games that have controller support. All you need to do is to pair the controller to your phone ...
A step-by-step guide to using the DualShock 4 on PC via Bluetooth.