The alarm volume can be set completely independently of other ringing or media volume tones on the Huawei smartphone.

Android 10 | EMUI 10.0
Step 1:  Open the  Settings
Step 2:  Tap on  Sounds & vibration
Step 3:  Swipe to the  left  or  right  to set the alarms volume
  1. Open the Settings
  2. Tap on Sounds & vibration
  3. Swipe to the left or right to set the alarms volume

Huawei Instructions