Alarm isn’t working after updating to iOS 17.2.1

iOS updates generally aim to enhance user experience, boost security, and fix bugs rather than disrupt core features. Sleep Alarm issues after updates might stem from underlying, unmentioned factors. Updates won't typically alter personal data but may refine settings or features. Backup before major updates for safety. Review Apple's update details and backup advice for a smooth process.

This seems purely coincidental so please check the Setting on your device. Set up a Sleep Focus schedule in Health on iPhone

See what each update does: About iOS 17 Updates, About iOS 16 Updates, About iOS 15 Updates, About iOS 14 Updates, About iOS 13 Updates, About iOS 12 Updates, and so on...

I figured this was just coincidence but when looking it up others have had the same experience. Nothing has changed and my settings look all the same like above and the alarm goes off with no noise. Please fix the issue and ship another .2 update for fix.

I am having the same exact issue with IOS 17.2.1. My original alarm no longer works at all and the new “sleep schedule” alarm only works when it feels like it and never works after I hit snooze. The fact that the alarm is having issues for people is a major problem, we count on these devices to get to work on time omg

It looks like the Alarm app is an option in the Focus functionality now. If you use the Focus mode type of Sleep, you have to add the Alarm app under Settings > Focus > Sleep > Apps > Add Apps > Alarms.

Please check if the Sleep schedule is for one day or certain weekdays. See the pic below which is self-explanatory