In Hauts-de-France, some TER are operated with TGV trains, labelled as TERGV, which require a supplement on normal TER tickets.
In the Railplanner, not all of these connections show up, and those that do, seem not to require a supplement with Interrail passes.
My questions:
1. do these trains require a supplement for IR passes?
2. is there a reason why not all connections are included in the Railplanner?