After starting the Oppo smartphone, not only the operating system ColorOS (Android) is loaded, but also fixed apps, but too many apps with an "autostart" can make the device sluggish.

On the Oppo-Smartphone there is an autostart manager, with which apps can be defined quickly and easily, which are executed automatically in the background when the smartphone starts.

Android 10 | ColorOS 7.0
Step 1:  Open the  Settings
Step 2:  Tap on  App management
Step 3:  Tap on  Auto-launch apps
Step 4:  Enable or Disable desired  App
  1. Open the Settings
  2. Tap on App management
  3. Tap on Auto-launch apps
  4. Enable or Disable desired App

Oppo Instructions