Joe Rossignol, reporting for MacRumors:

Apple released watchOS 11 today following months of beta testing. A key new health-related feature included in the software update is sleep apnea detection, which is available starting today on the Apple Watch Series 10, Apple Watch Series 9, and Apple Watch Ultra 2 in more than 150 countries and regions, according to Apple.

The list of countries includes the U.S., U.K., France, Germany, Italy, Spain, Japan, New Zealand, Singapore, and many others, with a full list available on Apple’s website. A few English-speaking countries where the feature is not yet available are Australia and Canada, as Apple is still seeking regulatory clearance for the feature in some regions.

Apple has also published the clinical validation summary for the sleep apnea notification feature.