windows.sharedFonts - is it possible to provide font file in a optional package?

[KiruyaMomochi]

I want to make a package that provides fonts for users. I have read https://docs.microsoft.com/en-us/windows/apps/desktop/modernize/desktop-to-uwp-extensions#fonts and successfully build such a "font package".

Such a package may be large, and some users may not need to use all these fonts, so I'm trying to create another optional package containing some additional fonts.

I tried to add windows.sharedFonts extension for these additional fonts in both main and optional package, but none of them works.

My question:
Is this even possible to provide font file in an optional package?
Or should I just create a new package since there are no real dependencies between these packages?