By default, all linked accounts of the Calendar app are displayed on the Xiaomi smartphone, but if we want to change this, for example to separate work from private life, we can show or hide each account individually.

Android 10 (MIUI 12.0)
Step 1:  Open the  Calendar app
Step 2:  Open the  menu
Step 3:  Open the  Settings
Step 4:  Tap on  Calendar accounts
Step 5:  Enable or disable the displayed  calendar accounts
  1. Open the Calendar app
  2. Open the menu
  3. Open the Settings
  4. Tap on Calendar accounts
  5. Enable or disable the displayed calendar accounts

Xiaomi Instructions