We have different categories to set an alarm tone for the Xiaomi device.
For example, the "Nature alarm" category plays a different tone of natural sounds every day. To do this, the clock needs access to the internet connection to download a new tone.
In addition to the categories, we can also easily select a pre-installed ringtone.

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  A  larm ringtone
Step 5:  Tap on  All ringtones
Step 6:  Select an  alarm ringtone
  1. Open the Clock app
  2. Open the menu
  3. Open the Settings
  4. Tap on Alarm ringtone
  5. Tap on All ringtones
  6. Select an alarm ringtone

Xiaomi Instructions