Don’t ever hand your phone to the cops - https://www.theverge.com/2024/9/24/24252235/police-unlock-phone-password-face-id-apple-wallet-id

Don’t ever hand your phone to the cops

Even if you’ve got nothing to hide.

Don't talk to them either while you're at it. Not even about the weather.

Step two: never volunteer information to the cops. Ask for a lawyer. Cops lie.

also they can use your face or thumb to open your phone against your will. either use PIN only or put your phone in emergency mode before talking to cops.

On iPhones, holding either the lock button, or the lock button and volume up button together for about five seconds will disable fingerprint/Face ID and require the passcode to unlock the phone. Always a good idea if you are approached by a cop.