the French AIP defines a large number of VFR transit routes in ENR 1.2-10 - 1.2-21, but only some of them are depicted in the map.
Just a couple of examples from the region I usually fly in: the itineraries for TMA CHAMBERY are depicted, but those for TMA LYON are not; the same for those in CTR ORANGE, whose VRP are not even in the database (the villages with the same names are there, but have slightly different coordinates, so technically they are not the VRP).
I didn't systematically check all routes, so I cannot quantify how widespread it is.
Assuming that the information about the routes is parsed from the AIP and not inserted by hand in the map, there should not be any reason for some routes to be missing. If indeed they added by hand, I think they should be added, because these routes exist since several years.
Thanks for looking into this!