Hi Kat,
Which program are you using? If you want to directly record your iPhone screen on PC using ApowerMirror or Phone Manager, then you need to use WiFi to connect. For USB connection, you can only mirror your iPhone screen to PC using Apowersoft Phone Manager, and it doesn’t have the recording function.
Mirror your iPhone screen to PC via WiFi and record your phone screen using ApowerMirror is the easiest and most straightforward way.
But if you really want to use USB cable, you can also mirror your iPhone screen to PC via Phone Manager and then record the computer screen using Screen Recorder.
Thank you!