It seems like that Scenic Routes invluded an automaticly detecting VDGS in their Ljubjana scenery wich is indipendend from the default ATC. So it should be possible to fly on Vatsim with VDGS isnt it? So could it be possible for Simwings, Aerosoft ect. To include this feature.
Here the product:
Here a Stream where dou can see it in action: