Some users signing up for AppleCare One have found that eligible devices don’t always appear as expected, or show a warning that a device check is required. Here’s what you need to do.

Plan limitations & missing devices. Image source: Apple

Plan limitations & missing devices. Image source: Apple
AppleCare One launched July 24 as a monthly plan that covers multiple Apple products under one subscription. It starts at $19.99 per month for up to three devices, and lets you add more for $5.99 each.
Before getting started with Apple One, the user must have a device eligible for AppleCare+ or currently on an active plan. After that newer device is set up, users can select other devices, up to four years old, to add to their AppleCare One service.