Xiaomi
Turn Notification Badges On or Off Per App auf Xiaomi
Notification badges on Xiaomi phones run independently from the notification itself. Even if you swipe away a message or mute an app's alerts, the small dot above the icon can stay visible because it is controlled by a separate switch inside the system settings.
This is why disabling notifications for an app in one place does not always clear the badge somewhere else. The badge system checks each app on its own list, so every app needs its own on/off decision.
To change it, go to Tap on Settings ➔ Tap on Notifications & Control center ➔ Tap on Badges ➔ Enable or disable the Notification badges of an app. From that list you can turn the dot off for apps that constantly show a counter without a reason, such as background services or rarely used tools.
Turning off a badge does not stop the notification itself from arriving. You still get the alert in the notification shade and on the lock screen, only the icon overlay disappears.
If you want to stop the app from notifying you at all, disable its notifications directly instead of just the badge. That is the better fix when an app is sending alerts you never need, rather than just displaying a persistent counter.

