It looks fuzzy on a tablet and laptop too.
I can just about make out “Sounds and Vibrations OFF”.
It is not clear whether the comment is that they are turned off for the phone or the app.
I have (or I had until yesterday, back to Samsung now), but I've never used the alarms on the app because I use DiaBox instead.
However, in the background your phone says 'Alarms are only available when you start a Freestyle Libre 2 sensor with this device'.
Did you start it with this phone or with the reader?
I saw something like that in early days.
As far as I can recall there are settings which turn off features when the phone goes to sleep overnight (perhaps also low battery).
Perhaps shutting down Bluetooth in some circumstances.
I let the App guide me through changing these settings (which weren't always obvious) and have been fine since.