Better Facial Recognition Security
Google already copied Face ID on its Pixel 4 last year, but Android 10 left one glaring omission in the security model — you could use it to unlock your Pixel even if your eyes were closed. In other words, hold up somebody’s Pixel 4 in front of their sleeping (or unconscious) face, and you’d be in.
Apple thought of this possibility before it introduced Face ID back in 2017 with the iPhone X, but it seems that Google Pixel 4 users will need to upgrade to Android 11 to secure their phones properly.