We can enable parallel apps for Messenger or social media apps, such as Instagram, Facebook, Messenger or WhatsApp on the OnePlus smartphone to use two different accounts or accounts on one device.

When you activate a so-called parallel app, a twin app is created, which can be recognized by a small orange icon on the app icon and can be found immediately on the start screen or in the app drawer.

Note: If a parallel app is disabled, all corresponding data is also removed.

Android 10 | OxygenOS 10.0
Dual Messenger apps -  Open the  Settings
Dual Messenger apps -  Tap on  Utilities
Dual Messenger apps -  Tap on  Parallel Apps
Dual Messenger apps -  Enable or disable an  app
  1. Open the Settings
  2. Tap on Utilities
  3. Tap on Parallel Apps
  4. Enable or disable an app

OnePlus Instructions