Interesting. That's actually quite a big inconvenience if the TCU cannot be woken up through the app. Just thinking of commuting to work and leaving the car parked outside without charging. But I still wonder if it is encrypted SMS that wakes up the TCU, couldn't that be done by the user? If I...
Oh, btw for the navigation to work you will need another module to be replaced in addition to the TCU if I remember correctly. The swedish mod seller has that one too available on their web shop. But you can also just use better navigation with apple/android auto.
How about just ordering new pre-programmed EU TCU from this company in Sweden? All you need to do is to remove the old one and install the new one.
https://carperformance.se/product/fordpass-smartphone-connection/