Define input type for Windows 10 touch keyboard fr

Question

I have a working JavaFX app running on windows 10. I would like to use the touch-keyboard in a similar to MSDN user input scope to change the touch keyboard HOWEVER there is no way to interact with it. All textfieeds open the Default keyboard. I would like to find the closest to JavaFX as possible solution.

Things I have tries so far:

1. Tried to use the WM_MESSAGE to trick the OS, see Here. This is a messy workaround that does not work on windows 10.
2. Encapsulating the WM_MESSAGE or InputScope object in an executable, and calling it from JNI only creates a one-way transition from app to keyboard. it will not suffice.
3. Using a custom keyboard or the JAvaFX touch keyboard (see here is not a valid solution as these keyboards look a bit messy, and they require some twirking we already know exist.
4. set-numeric-layout-for-windows-onscreen-keyboard-programmatically not working.
5. activating-touch-enabled-controls-in-javafx is irrelevant.