How to unlock my iPhone 11 Pro

This article should answer: How to unlock your iPhone for use with a different carrier - Apple Support.

If you mean a unlocking your lock screen, swipe up from the bottom of your lock screen and enter your passcode or use Face ID. If you forgot your iPhone passcode, follow this link If you forgot your iPhone passcode - Apple Support

We assume that you are locked out of the iPhone because you forgot your passcode.

If you forgot your iPhone passcode - Apple Support

If you are sure that your iPhone is now running iOS 15.2 or higher.........

How to reset your iPhone, iPad, or iPod touch when you forgot your passcode - Apple Support