According to the developer Assemble Debug broke the news, including Samsung Galaxy Watch smartwatch, all running WearOS smartwatches will soon support unlocking phones.
Assemble Debug in the tweet also released a 1-minute long demo video, you can see that in the case of not using fingerprint or facial recognition, you can unlock the phone through the smartwatch.
After the paired Wear OS watch is close to the phone, a notification will automatically pop up on the phone’s end, and the user can also swipe on the smartwatch to unlock the phone.