I'm trying to use MaterialDesignIcons in a Xamarin Forms Shell app. The latest version of this font encodes all of the glyphs in the upper bit planes (see this old StackOverflow question about that).
The problem I have is that I don't know how to identify the proper XAML escape sequence for upper bit plane glyphs. For example, \uf30c in C# code translates to  in XAML. But I don't know how to translate an upper bit plane value (e.g. \U000f0706) to the correct XAML escape sequence.
I thought I'd just use a binding to code instead, but this is blocked by an open bug. There's a workaround in that GitHub issue, but it doesn't seem to work for a Tab Bar Icon (which is where I'm trying to use it).
TL;DR - how to I write \U000f0706 in XAML?