Freestyle Libre 2 Manual Del Usuario página 84

based on your phone's settings.
You must keep Allow Critical Alerts ON for the App in the phone settings.
Android Users:
Turn OFF Override Do Not Disturb if you want the alarm volume to follow
your phone's Media volume, and be silent when Do Not Disturb setting is
enabled. Visual and Vibratory notification for the alarm may be presented
based on your phone's settings.
You must keep Do Not Disturb access permission ON for the App in the
phone settings.
4. Tap the back button to return to the main alarm settings screen.
(Example screen displayed for iPhone)
ART46983-001_rev-A 24-Aug-2022 2:30pm