We can set calendar app reminders with sound and vibration on the Huawei smartphone, which can be set to a custom ringtone and/or enable or disable the vibration.

Android 10 | EMUI 10.0
Step 1:  Open the  Calendar app
Step 2:  Open the  menu
Step 3:  Open the  Settings
Step 4:  Tap on  Notifications
Step 5:  Tap on  Sound
Step 6:  Choose a  sound  for calendar reminders
Step 7:  Tap on  Back
Step 8:  Enable or disable  Vibration
  1. Open the Calendar app
  2. Open the menu
  3. Open the Settings
  4. Tap on Notifications
  5. Tap on Sound
  6. Choose a sound for calendar reminders
  7. Tap on Back
  8. Enable or disable Vibration

Huawei Instructions