If you don't want to have notifications on the lock screen of the Oppo smartphone, you can disable them. Under ColorOS, notifications can be turned on or off individually for each app.

Android 10 | ColorOS 7.0
Step 1:  Open the  Settings
Step 2:  Tap on  Notifications & status bar
Step 3:  Tap on  Manage notifications
Step 4:  Tap on  Lock screen notifications
Step 5:  Choose between  Display title and body,   Display title only  and  Do not display
  1. Open the Settings
  2. Tap on Notifications & status bar
  3. Tap on Manage notifications
  4. Tap on Lock screen notifications
  5. Choose between Display title and body, Display title only and Do not display

Oppo Instructions
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