There is no doubt that when it comes to the internal specifications of a device, Apple is the most secretive about the details of their devices. The amount of RAM, battery capacity etc. is sometimes not shared. Even for the Apple Watch, the full specification page is not provided except to compare with other models. Recently, the Apple Watch finally has a technical specification page.
For now it is only limited to Apple Watch Ultra 2, Apple Watch Series 9 and Apple Watch SE. This page is complete with watch details such as construction materials, color options, size, component details, processing chip information, sensor list, list of features and functions, display details, battery and software details, and various other information.
The page to compare between Apple Watch is still included, but this technical specification page is finally included directly to the product page just like MacBook, iPhone and other products. After this you can know more about Apple Watch.