When we start or activate the Xiaomi smartphone for the first time, a Google search bar is displayed on the home screen by default, but it can be easily removed if you don't want it.

Android 10 (MIUI 12.0)
Step 1:  Tap and hold the  Google search bar
Step 2:  Tap on  Remove
  1. Tap and hold the Google search bar
  2. Tap on Remove

Xiaomi Instructions