The alarm times stored in the OnePlus smartphone's Clock app can be enabled or disabled at any time and independently of each other so that we don't have to set them again.

Android 10 | OxygenOS 10.0
Turn on/off an alarm -  Open the  Clock app
Turn on/off an alarm -  Enable or disable an  alarm
  1. Open the Clock app
  2. Enable or disable an alarm

OnePlus Instructions