how to make a phone unsearchable

In ireland a cop can search you and you’re legally mandated to give him your phone passcode and he can look through it

What i want is to make it so I can enable some sort of lockdown on the apps on my phone that he can’t access, or put some sort of lock on my phone that requires an email to open apps. Basically something so that even if you know my passcode, you can’t look through the phone, …

access apps can enable ireland lock lockdown passcode phone privacy search sort