Alarm volume on iPhone 13

Hey there, and welcome to Apple Support Communities Northerngaslights,

We can certainly understand your concern and see you came to us from the article How to set and change alarms on your iPhone.

We recommend checking out these steps for more information on how to adjust the volume and sounds for your iPhone.

" Set sound and vibration options

1. Go to Settings  > Sounds & Haptics (on supported models) or Sounds (on other iPhone models).
2. To set the volume for all sounds, drag the slider below Ringers and Alerts.
3. To set the tones and vibration patterns for sounds, tap a sound type, such as ringtone or text tone.
4. Do any of the following:

• Choose a tone (scroll to see them all).
  • Ringtones play for incoming calls, clock alarms, and the clock timer; text tones are used for text messages, new voicemail, and other alerts.
  • Tap Vibration, then choose a vibration pattern, or tap Create New Vibration to create your own. "

For additional information, check out this link: Change iPhone sounds and vibrations - Apple Support

Kindest regards!