The update to MIUI 12 brought a new control center to the Xiaomi smartphones. There, we will find the quick settings set to a simplified and clean overview.
To open the new control center, swipe from the top border in the middle of the screen.

Android 10 (MIUI 12.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Display
Step 3:  Tap on  Status bar
Step 4:  Enable or disable  Use new Control center
  1. Open the Settings
  2. Tap on Display
  3. Tap on Status bar
  4. Enable or disable Use new Control center

Xiaomi Instructions