Apple has just released watchOS 6.1.3 for Apple Watch users. The update features small improvements and bug fixes, including an issue where the irregular heart rate notification wasn’t appearing for users in Iceland.
You can download watchOS 6.1.3 now on the companion Watch app by going to the My Watch tab and selecting General > Software Update. On an Apple Watch, you can also update by going to Settings > General > Software Update.
When updating, the watch needs to have more than 50 percent power, placed on a charger and in range of an iPhone.