Google's Pixel 6 and Pixel 6 Pro were the first flagship smartphones, but they did not feature Face Unlock. 

Google introduced the Pixel 4 in 2019 with dedicated hardware for enabling Face Unlock, called Soli radar, which operates similarly to Face ID on an iPhone.

The entire setup was, however, removed from the Pixel 5 that was released in 2020. Google had planned to introduce a face unlocking feature for the Pixel 6 Pro. 

Last year, just prior to the launch of the Pixel 6 Pro, a leaked marketing copy and Play Store listing suggested that the smartphone would have a face unlock feature, but that did not happen either.

Google pulled the plug on Face Unlock at the last minute, according to the publication, due to some accuracy and battery concerns. It is possible that Google will launch the feature with the Pixel 7 and Pixel 7 Pro later this year.

Samsung S6E3HC4 panel is reportedly being used in the Google Pixel 7 Pro. Even though the Pixel 7 Pro's display has the same resolution as the Pixel 6 Pro, Android 13 beta's source code indicates that the Pixel 7 Pro's display will be slightly brighter. 

The new code, discovered by tipster Mishaal Rahman, suggests that the Pixel 7 Pro could achieve a maximum brightness of 600 nits in manual mode, which is approximately 20% higher than that of the Pixel 6 Pro.

Furthermore, the tipster recommends that the Pixel 7 Pro's auto mode can deliver a maximum brightness of 1200 nits, which is almost 50% higher than on the Pixel 6 Pro.

Additionally, the new S6E3HC4 panel could support advanced features like HDR10 and HLG imagery. Pixel 7 Pro might support a native FHD resolution mode and a refresh rate ranging from 10Hz to 120Hz, which would increase battery life.