@kekekeks Historically any complex XAML design even using design-time DataContext injection was not supported neither in WPF nor in Silverlight. I cannot judge for Xamarin. So my best bet was to use XAML Viewer of any kind expecially when I am trying to move items and change font size etc... to get a pixel perfect design
I will write my own HarfBuzz binding to better understand how the API should look like and how to use it properly. I want to have a binding that let's you use the library as it should be and not just some box you throw your text in and hope things get right. The good thing is Skia and HarfBuzz don't dependent on each other. There is a reason there are other bindings out there but all seem to have issues.