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