For cities in that above list, the app returns Simple Routing, which means "...Simple routing uses the map data to calculate a heuristic route, based on the likely frequency of lines". In other words, if you go to http://maps.nokia.com/45.4755859,9.2...0,0,normal.day and click on the Bus icon to show the public transport on the maps you'll see tram/train lines.

This means, you'll be able to find routes on these lines on the app. Please see attached. Of course, if the map contains more transport services, like bus, ferries then these will be available as well.

The routes returned are not ideal or the most optimal, since the app can only work on the data it gets from maps, rather than using the data from the transit agency.

Please try again, and can you give us the details of the places you tried on the app?