[Arubis]

This has long been true. In a pinch you can mash the power button 5+ times to require a key code at next unlock.

[steve-atx-7600]

Also, on iPhone, if you have face ID turned on, you can hold power+volume down (may differ depending on model) to force a passcode.

[3pt14159]

This doesn’t work for my iPhone that’s about three years old.