By default, the Xiaomi device adds a device watermark to each photo, indicating which device was used to take the image. The watermark is added at the bottom left of the photo. If we don't want this on our photos, we can always turn the feature off.

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  Watermark
Step 5:  Enable or disable  Device watermark
  1. Open the Camera app
  2. Open the menu
  3. Open the Settings
  4. Tap on Watermark
  5. Enable or disable Device watermark

Xiaomi Instructions