Apple Planning 'Ten Year Celebration' Activity Achievement for Apple Watch

Apple appears to be planning an activity challenge to celebrate the 10th anniversary of the Apple Watch, which was released in 2015. In the latest iOS 18.2 beta, there's a mention of a "Ten Year Celebration" with references to an activity achievement, so it sounds like something is in the works.
While the Apple Watch was introduced at Apple's September 2014 iPhone event, it was not released until April 2015. The delay between the device's introduction and its launch have raised questions about w