I recently has a discussion with some friends about a court decission here in Germany, that it is legal for the police get the fingerprints from a suspect and unlock the phone with them. This overall ended up in a discussion if a PIN or biometric login in more secure. (I think a long PIN + Keypad Scambling + Privacy Glass is more secure).
However, we came to the point where a threat actor may demands from you to tell him the PIN to unlock the phone. We came up, that a self destruct PIN that resets the phone to factory default would be a cool feature. Because when the phone is wiped, the data that the threat actors wants is gone.