We can enable the data usage warning on the Xiaomi smartphone to gain control over data usage, or we can disable the data usage settings completely and receive no further warnings.

Android 10 | MIUI 12.0
Step 1:  Open the  Security app
Step 2:  Open the  Settings
Step 3:  Tap on  Data usage
Step 4:  Enable or disable  Data usage
  1. Open the Security app
  2. Open the Settings
  3. Tap on Data usage
  4. Enable or disable Data usage

Xiaomi Instructions