Everyone needs to do these 3 steps:
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Turn on Screen Time, set a distinct screen time passcode.
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Enable Content & Privacy Restrictions
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Within Content & Privacy Restrictions, set both Account Changes and Passcode Changes to Don't Allow
This prevents an attacker from changing your Apple ID password or making changes to Face ID/Touch ID.
It can't block everything, though, but it limits the damage that can be done.
[deleted] t1_ja2otqi wrote
It doesn’t stop them if they use the emergency reset feature as this bypasses everything.