Unlock using apple watch

Pre the related article at the top of this page:

What you need

Unlocking your iPhone with your Apple Watch requires these devices:

• An iPhone that uses Face ID (iPhone X or later) and has iOS 14.5 or later
• An Apple Watch Series 3 or later with watchOS 7.4 or later

The feature also has these requirements:

• Your Apple Watch needs to be paired with your iPhone.
• Your iPhone and Apple Watch need to have Wi-Fi and Bluetooth turned on. (You don't need to be connected to a Wi-Fi network.)
• Your Apple Watch needs to have a passcode, and wrist detection must be turned on.
• Your Apple Watch needs to be on your wrist and unlocked.
• You need to be wearing a mask that covers your mouth and nose.