unable to mirror iphone screen on macbook

What Operating Systems are you using on the iPhone and MacBook?

You need your MacBook to run MacOS Monterey (12.0.1) and your iPhone to run iOS 15 to be able to mirror your iPhone screen on the MacBook.

On your iPhone, swipe up to Control Centre, and you will see a button that looks like this: (Bottom right corner)

Both your iPhone and your MacBook need to be connected to the same Wi-fi (or both turned on Bluetooth) to be able to mirror your iPhone's screen to the Mac.

This might be some hardware problems. I'm using an iPhone 6s, which is very old, and a MacBook Air (2019). The iPhone is able to mirror the screen to my MacBook.