My son has an Apple Watch SE running watchOS 9.3.1 (current). I'd never touched an Apple Watch but we wanted to get some data on sleep issues so I dug into it a bit. It turns out that the Sleep app is a frequent topic of Apple Discussion posts. I'll summarize what I learned here in case Google miraculously works and it's helpful to someone else.
References that were actually helpful:
- Apple Watch User Guide - Track your sleep
- Apple Track Sleep with Apple Watch and iPhone
- Identify Apple Watch
- Restoring Sleep App (reddit): "Open https://apps.apple.com/us/app/sleep/id1505627600 on your phone, then share/text the link to yourself and open it on your apple watch, then download the sleep app"
- It's not obvious which Apple Watches support the Sleep app. It seems to work on any device that can run the latest OS. His SE qualified.
- It's possible to delete the Sleep app from Apple Watch. His didn't have it; he may have accidentally deleted the app. App Store search is utterly broken so it's hard to find it to reinstall. Reddit had directions (see above) that worked.
- Once you have the Sleep app reinstalled you need to follow the directions on Apple Track Sleep with Apple Watch and iPhone carefully including this part: "If you paired your Apple Watch after completing Sleep setup, you can still turn on Track Sleep with Apple Watch. In the Watch app on your iPhone, tap the My Watch tab, then tap Sleep. Then tap Track Sleep with Apple Watch to turn on this setting."
- The reports are well done but they are only viewable on the iPhone or Apple Watch. There's no export or print function . Third party apps may have more capabilities, but the App Store is a sewer so I didn't want to wade into it. Instead I did a bunch of screenshots from his iPhone and used Picsew to stitch them together and Preview to create a PDF with the reports.