At the moment, the Station PIS does not indicate that the S2 goes to Dresden Airport on this Route. If DTG is ever able to fix this Bug, it would be nice to see if they could remember this "specialty" I noticed today when I was in Dresden Mitte. The PIS doesn't show the word Airport or Flughafen, just an Airplane Sympol. Edit: I changed the Ingame Image to show the same Service as IRL
That should also affect the ICE Services to Flughafen Frankfurt Am Main on Riesa-Dresden. PIS Display is Dresden Neustadt Riesa Leipzig Erfurt Gerstungen Bebra Bad Heresfeld Fulda Frankfurt Main Hbf Frankfurt ✈ Fernbahnof Wiesbaden for ICE services.