Google is testing a new accessibility feature as part of Android 12, and it could change how you interact with your smartphone. So far, Android 12 recognises six movements, including raising your eyebrows and open your mouth.
https://www.notebookcheck.net/Google-is-trialling-facial-gesture-controls-in-Android-12-feature-could-be-available-to-older-smartphones-too.555773.0.html