OpenData only from Verbuende valid or also from State agencies, like NVBW?

In Baden-Wuerttemberg, only very few Verkehrsverbuende directly offer open data GTFS datasets.
The ministry of Transport gave NVBW the order in 2019 to generate GTFS files for every Verkehrsverbund in Baden-Wuerttemberg and also a statewide dataset.

Is it valid to change the QGIS Layer of Open-Data datasets for whole Baden-Wuerttemberg?

No file, test, or entry point is named. First clarify whether NVBW and statewide GTFS datasets should be accepted, then inspect how the QGIS layer currently selects Open-Data datasets; done means the approved source scope is decided and the layer reflects it.

Written by the indexing model from the issue text.