@janvlug at least for me, in GNOME Maps on a desktop computer (big screen), if I make it show a route then in the bottom-right corner of the screen it says "itineraries provided by" followed by the name of some org. or company or something, from where the itinerary information comes. Then I guess that may be the right place so report issues.
But I don't understand why it works in some places and not others. For me it only seems to work in Sweden, not in the Netherlands, for example. Why?
@eliasr Currently, #transitous is not in the stable GNOME Maps application. It will be added in the next release.
I discovered the issue via #Railway, and confirmed it by trying also on https://transitous.org/