You are right that there is no dedicated website for our UWP documentation. However, if you compare the controls available for WindowsUniversal and UWP you will see that there are very few differences.
For example the RadHexView control is available for WindowsUniversal but it is not available for UWP. This is also clearly stated in the Overview
article of the control (and every other control). We decided not to create a separate website to cover such small differences. Moreover one day we could migrate all the WindowsUniversal components to UWP and there will be no need of a separate documentation website.
Besides a few missing components for UWP there is no other difference between the WindowsUniversal and UWP documentation. This is why there is no dedicated website for UWP.
Pavel R. Pavlov
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