The alarm times stored in the OnePlus smartphone's clock app can be deleted at any time to keep track of what has happened, for example, if a complete shift change has taken place.

Android 10 | OxygenOS 10.0
Delete alarm -  Open the  Clock app
Delete alarm -  Tap and hold an  alarm
Delete alarm -  Tap on  Delete
  1. Open the Clock app
  2. Tap and hold an alarm
  3. Tap on Delete

OnePlus Instructions