Code in a Google app teardown points to an 'inactivity reboot' feature.
This feature is similar to the security tool on iPhones, in which the device automatically reboots after three days of inactivity.
The 'inactivity reboot' feature is not active on Android yet but is expected to be part of Android 16.
Android 16 is likely to have Advanced Protection Mode, along with additional security features such as blocking sideloading, disabling 2G connections, and enabling Memory Tagging Extension (MTE) for apps.