The developer options on the Xiaomi smartphone are irrelevant for normal users, as they offer some options specifically for developers and we do not use them to their full extent, with a few exceptions, such as USB debugging.
To unlock the developer options, we only need to tap the MIUI version seven times.

Note: The unlocked developer options can be found under the menu item "Additional Settings".

Android 10 (MIUI 12.0)
Step 1:  Open the  Settings
Step 2:  Tap on  About phone
Step 3:  Tap  seven times  on  MIUI version
Step 4:  Watch the displayed  pop-up
  1. Open the Settings
  2. Tap on About phone
  3. Tap seven times on MIUI version
  4. Watch the displayed pop-up

Xiaomi Instructions