Can you check these steps below in how to control the volume level on Active 2, which will help with the alarm volume as well,
Volume Set volume levels. 1. From the Apps screen, rotate the bezel and tap Settings. 2. Tap Sounds and vibration > Volume. • Swipe the screen from right to left to see the volume levels for Ringtone, Media, Notifications, and System. • Rotate the bezel to change the volume level for each category.
Have a great day.