Phones could allow much higher security if they supported 2 factor authentication. This could be face/fingerprint along with a typed or swiped password. This seems like a simple solution that leverages software that is already implemented. Just make it an added option in addition to the existing one

ETA: Sorry for the duplicate posts, I was getting error messages. Pls use this one.

I am surprised there is confusion about what 2fa is. Here is a simple definition: https://www.microsoft.com/en-us/security/business/security-101/what-is-two-factor-authentication-2fa