I found this question today when looking for such a diagram for WPF controls.

When searching for wpf controls inheritance diagram or wpf controls class hierarchy diagram, it shows that there are a couple of diagrams for WPF control inheritance:
https://medium.com/wpf-windows-presentation-foundations-by-peculia/wpf-overview-controls-class-hierarchies-d8f373a3a62f (only a few classes)
https://kittencode.wordpress.com/2011/02/03/wpf-class-hierarchy-diagram/ (seems to be complete)
http://www.japf.fr/2010/01/wpf-internals-how-the-wpf-controls-are-organised/ (many classes, but likely not complete; shows properties)

I have not checked any of them, thus I cannot tell whether they are complete or correct.

When searching quickly for uwp controls class hierarchy diagram, I was not able to find something similar. But I did not put much effort in this search, because I needed the diagram for WPF.