Hi
To adjust the volume of the camera shutter sound:
- Use the Ringer and Alerts volume slider in Settings > Sounds & Haptics.
- The camera shutter sound can also be muted using the Ring/Silent switch - check the position of the switch.
(In some countries, muting is disabled).
- It is normal for there to be no camera shutter sound when taking Live Photos.
To toggle Live Photos on / off, tap the Live Photos icon above the camera viewfinder: