Instead of completely disabling notifications of an installed app on the OnePlus smartphone, we can also mute or silence all notifications of an app or app category.

For example, if the notifications about incoming WhatsApp messages are muted, they will still be displayed to us, just not with sound and vibration.

Android 10 | OxygenOS 10.0
Step 1:  Open the  Settings
Step 2:  Tap on  Apps & notifications
Step 3:  Tap on  See all apps
Step 4:  Choose an  app
Step 5:  Tap on  Notifications
Step 6:  Choose a  category
Step 7:  Enable  Other
  1. Open the Settings
  2. Tap on Apps & notifications
  3. Tap on See all apps
  4. Choose an app
  5. Tap on Notifications
  6. Choose a category
  7. Enable Other

OnePlus Instructions