The Xiaomi smartphone's camera app offers a wide range of settings. if a user doesn't get the results they want or hope for, all camera settings can be restored to default.
When restored to default settings, existing photos and videos remain saved and are not deleted.

Android 10 (MIUI 12.0)
Step 1:  Open the  Camera app
Step 2:  Open the  menu
Step 3:  Open the  Settings
Step 4:  Tap on  Restore default settings
Step 5:  Confirm with  OK
  1. Open the Camera app
  2. Open the menu
  3. Open the Settings
  4. Tap on Restore default settings
  5. Confirm with OK

Xiaomi Instructions