Back in the day, the best Android phones had notification lights. These RGB spots would flash or pulse when you had a notification. You could even change the lights, so you knew what kind of notification was waiting for you just by looking at it. For example, you could have a blue pulsing light for Facebook Messenger and a white flashing light for emails.
Over time, the notification LED vanished as display bezels got too slim to house them. With Android 14 notifications, though, it looks like you’ll be able to at least somewhat replicate the functionality of a notification LED on any Android phone (h/t Mishaal Rahman).