The status bar of the Oppo smartphone shows new notifications for each individual app, but if you don't want the notification icons to be displayed, we can alternatively show the number of notifications or turn the display off completely.

Note: This setting only affects the display in the status bar, not in the notification window.

Android 10 | ColorOS 7.0
Step 1:  Open the  Settings
Step 2:  Tap on  Notifications & status bar
Step 3:  Tap on  Notification prompt
Step 4:  Choose between  Icon,   Notification count  and  Do not show
  1. Open the Settings
  2. Tap on Notifications & status bar
  3. Tap on Notification prompt
  4. Choose between Icon, Notification count and Do not show

Oppo Instructions