Forgot 6 digit PIN on iPhone X
How do I retrieve my 6 digit PIN without erasing my device?
iPad Air Wi-Fi, iOS 11.2.1
Question marked as
You cannot.
Think about how easy it would be for a thief to pick up your device, go through whatever steps you would go through to "retrieve your PIN", and then recover all the personal information on your device.
Erase your device, then restore a backup.