If desired, software updates of the Oppo smartphone can be installed automatically overnight. However, this requires that the smartphone is not currently in use. The automatic installation takes place between 02:00 and 05:00.

Updates are only downloaded if a WLAN connection is available, and the function is not available for larger updates.

Android 10 (ColorOS 7.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Software update
Step 3:  Open the  Settings
Step 4:  Enable or Disable  Auto update overnight
  1. Open the Settings
  2. Tap on Software update
  3. Open the Settings
  4. Enable or Disable Auto update overnight

Oppo Instructions