It is also worth considering that device settings may affect the operation of the alarm. For example, the volume of the sound is controlled by a slider that adjusts the ringtone and notification levels, and the "Change with Buttons" feature may accidentally lower the volume when using physical buttons.
Additionally, the "Attention Awareness" feature, which is related to Face ID, may be causing the issue. If the sensors detect that the user is looking at the screen, the system automatically reduces the volume of notifications and alarms. To ensure the alarm sounds at maximum volume, this feature can be disabled in the settings: "Face ID & Passcode" - "Attention Awareness."
