TL;DR

Android 16 will introduce a new Night Mode Indicator API to help apps automatically optimize photo capture in low-light environments.

Instagram and other social apps will use this to trigger Night Mode, thereby improving image quality and informing users when they are clicking images in low-light conditions.

Select devices, such as the Pixel 6 and above, Galaxy S24 Ultra, and others, already support the feature and display a moon icon to help users activate Night Mode.