We can enable an option to lock the OnePlus smartphone immediately, which is displayed in the power on/off menu and disables all automatic unlock features via Face Unlock, Fingerprint Scan or Smart Lock to instantly back up the device and its data.

In order to unlock the smartphone again after activating this function, the respective unlocking method (pattern/PIN/password) must be entered manually.

Android 10 (OxygenOS 10.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Security & lock screen
Step 3:  Open the  Settings
Step 4:  Enable or disable  Show lockdown option
  1. Open the Settings
  2. Tap on Security & lock screen
  3. Open the Settings
  4. Enable or disable Show lockdown option

OnePlus Instructions
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