You might want to do this iOS settings => Sounds and Haptics => Drag the Ringtone and Alert Volume slider up higher and turn off change with buttons The alarm

You might want to do this iOS settings => Sounds and Haptics => Drag the Ringtone and Alert Volume slider up higher and turn off change with buttons The alarm clock volume on iOS is separate from your normal volume. So if it accidentally got lowered then your alarm clock will never make any sound. It can get accidentally lowered if you have change with buttons on so I turn that off. Turning off change with buttons just fixes your alarm and ringer volume, it won’t prevent you from changing your volume normally when listening to music