How do I recover forgotten password?
Forgot iPhone password, now what?
You can't recover it, you will need to reset your phone.
If you forgot the passcode on your iPhone, or your iPhone is disabled or unavailable -
How to reset your passcode without a computer if you have iOS 15.2 or higher.
https://support.apple.com/en-us/HT212951
How to reset your passcode using a computer.
If you forgot your iPhone passcode - Apple Support