IL2CPP support for HoloLens: absolute hand position during a gesture

It seems that some HoloLens-specific classes (like VR.WSA.InteractionManager) contain static methods which are passed to native functions. Definitions of those methods lack appropriate il2cpp attributes, making it impossible to use some standard functionality in il2cpp application. In particular, InteractionManager does not work at all on il2cpp backend.
As a result, it is currently (to the best of my knowledge) impossible to retrieve hand position on il2cpp because GestureRecognizer provides callbacks with cumulative delta only. (case 854683)
Has anyone else encountered this issue and is there any workaround available?