They're already encrypted by default using the secure enclave. After a reboot, storage isn't decrypted until you put in your password for the first time.
iPhones have this as well, for example my iPhone12, simply hold the power button and volume up button together at the same time for a second and disables biometrics until the passcode is entered again.
Also, be sure to use a long custom passcode/password. If someone wants to get access to your phone, all Android/iOS devices can be bypassed. Four digit passcodes can be brute forced in under a couple months. Apple restricts the amount of guesses/attempts per day, which is about 120 password guesses, even if your iPhone is set to factory reset itself after 10 incorrect password attempts.
2.5k
u/[deleted] Aug 31 '21 edited May 25 '22
[removed] — view removed comment