To enable Notification Cooldown on Android 15, follow these steps based on the information provided:

  1. Open the Settings app on your Android 15 device.
  2. Navigate to Settings > Notifications > Notification cooldown.

By default, Google enabled Notification Cooldown in the Android 15 Developer Preview 1. However, if you wish to adjust its behavior or turn it off entirely, use the settings mentioned above. In this menu, you can select whether to apply Notification Cooldown to all notifications or specifically to conversations.

Please note that the Notification Cooldown feature is currently part of the Android 15 Developer Preview, which is intended primarily for developers and is not yet a stable release. The process to access this feature requires downloading the OS from Android Studio and sideloading it onto compatible Google Pixel devices (6 and later).