Google is working on introducing new 'Pixel Themes' in the Android 16 QPR1 Beta 1 build for Pixel phones.
The code found in the beta release indicates a feature called Themes in the Wallpaper and Style section, possibly involving Pixel Customization Packs.
It is uncertain whether Google is planning to launch a theme store for Pixel devices or if the feature will mainly focus on coordinating wallpapers with system colors and icons.
The emphasis on device personalization during Google I/O suggests a strong possibility of enhanced customization options for Pixel phones in future Android 16 releases.