contentFiles from nuget not shown in Xamarin Android XAML App project

We have nuget package that installs some T4 files for codegeneration using contentFiles.
While it is already behave differently for old/new projects by including files as-is or as links, for xamarin project I don't see those files in project tree at all.

What is interesting, is that templates work - I just need to create tt file manually. But it is only because I know what to do. Normally users read instruction, create tt file using sample file and run it, but now they cannot do it, because nor instruction, nor sample template is visible to them.