Alarm does not sound

[Jonasolof]

Alarm volume is set on full but the phone only vibrates. 

[_alexdon_]

@Jonasolof have you checked if the alarm itself is not to vibrate only?

How to check if the alarm is not set to vibrate only:

https://support.sonymobile.com/gb/xperiaxz2compact/userguide/alarm-clock/#gref