If we enable this feature, the Huawei smartphone will visually alert us of a new notification.

Note: The function is model dependent 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:  Enable or disable  Flash notification light
  1. Open the Settings
  2. Tap on Notifications
  3. Tap on More notification settings
  4. Enable or disable Flash notification light

Huawei Instructions