No, because if there was the app could either brute-force your pin or lock you out by trying it too often :-) If there was a way this would be a pretty big vuln

No, because if there was the app could either brute-force your pin or lock you out by trying it too often :-) If there was a way this would be a pretty big vulnerability from Apple’s side. Even in the unlikely event that there is some private API, there is no chance you could pass an App Store review with that in your code