Earlier this month, an APK teardown done by 9to5Google detailed an upcoming update that would enable a new interface for Pixel devices while wirelessly charging on a Pixel Stand which debuted with the Pixel 3 and 3 XL last year. The latest news on the update is that some of the screens and elements were successfully enabled to give us an idea of how the mode will work. As tested by 9to5Google, the clock lives in the upper left corner and displays the weather directly across from it. At the bottom is the Google Assistant logo, which acts as a reminder that you could say use the hot command...
Source: https://www.gsmarena.com/this_is_what_google_assistants_ambient_mode_is_going_to_look_like-news-38139.php