Alternative system launchers offer the possibility to customize startup screens to your own needs, which the standard launcher of ColorOS may not offer.

In order for the desired launcher to be displayed on the Oppo smartphone, it must be set as default.

Android 10 | ColorOS 7.0
Step 1:  Open the  Settings
Step 2:  Tap on  App management
Step 3:  Tap on  Default app
Step 4:  Tap on  Home app
Step 5:  Tap on  App  you want
  1. Open the Settings
  2. Tap on App management
  3. Tap on Default app
  4. Tap on Home app
  5. Tap on App you want

Oppo Instructions