If you activate this function, the Huawei smartphone visually shows you, that there is a new notification.

Note: The setting depends on the model and may not be supported by every Huawei device.

Android 10 | EMUI 10.0
Step 1:  Open the  settings
Step 2:  Tap on  Notifications
Step 3:  Tap on  More notification settings
Step 4:  Activate or deactivate  Flash notification light
  1. Open the settings
  2. Tap on Notifications
  3. Tap on More notification settings
  4. Activate or deactivate Flash notification light

Huawei Instructions
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