apple: Apple's new iPhone OS update also has 'good news' for Apple Watch users
Getting an Apple Watch repaired in case of any firmware related issue has been tough. For users were required to take it to the authorised service center. This seems to have changed with the latest iOS and WatchOS updates. With iOS 15.4 and watchOS 8.5 updates, the company has introduced a new tool that allows users to restore their Apple Watch firmware using an iPhone.
Source: gadgetsnow.com