The app lock can also be completely deactivated, allowing all apps on the Xiaomi smartphone to be released for use and hidden apps to reappear.

Android 10 (MIUI 12.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Apps
Step 3:  Tap on  App lock
Step 4:  Open the  Settings
Step 5:  Disable  App lock
Step 6:  Confirm with  OK
  1. Open the Settings
  2. Tap on Apps
  3. Tap on App lock
  4. Open the Settings
  5. Disable App lock
  6. Confirm with OK

Xiaomi Instructions