Oh Chuck, I should clarify: I'm using SF Symbols unicode characters and those are in "Private Use Area-B". So they are not from the Unicode Standard. They are Apple specific and the Unicode.Scalar.Properties are returning meaningful values now. For these codepoints properties, where and who define and maintain them?
I'm asking this question because its seem these values are set in stone already and cannot be changed. But I keep being told these values cannot be rely on and can be changed in the future. I just don't see how they can publish these thing and want to change them, If they cannot be rely on, then Unicode.Scalar.Properties should not be returning any values.