If an installed app is no longer needed on the OnePlus smartphone, or if it no longer functions properly, the app can be uninstalled at any time to free up space.

Uninstalling an app will delete all associated app data and settings.
This means that any chat histories, photos, videos, PDF files, saved passwords or game progress will be irretrievably deleted unless they have been backed up elsewhere, such as the cloud, Google Drive or as a backup in internal storage.

An app can be uninstalled from the home screen or in the app drawer.
To do this, we simply hold the app icon and then select the uninstall button.

Android 10 | OxygenOS 10.0
Uninstall an app -  Tap and hold an  app
Uninstall an app -  Tap on  Uninstall
Uninstall an app -  Confirm with  OK
  1. Tap and hold an app
  2. Tap on Uninstall
  3. Confirm with OK

OnePlus Instructions