We can set a specific ringtone for the timer function on the Xiaomi smartphone. We can choose between pre-installed ringtones and custom ringtones. It is also possible to select an .mp3 file.

Android 10 (MIUI 12.0)
Step 1:  Open the  Clock app
Step 2:  Open the  menu
Step 3:  Open the  Settings
Step 4:  Tap on  Timer ringtone
Step 5:  Select a  Timer ringtone
  1. Open the Clock app
  2. Open the menu
  3. Open the Settings
  4. Tap on Timer ringtone
  5. Select a Timer ringtone

Xiaomi Instructions