There are no static planes at LSZH or, at least, nothing we added.
Everything you see is generated by the simulator automatically, based on your traffic settings.
MSFS is quite different than FSX in the way AI are created. With FSX, in order to see parked planes, they had to be proper AI with a schedule. In MSFS, this is no longer required because, in order to not have the airports feeling empty when there's no scheduled flight coming, AI will be created automatically, which might look as "static". However, if a real flight or a schedule flight is approaching its departure time, if a matching airplane model is found amongst one of the static AI which were created automatically, it will be "promoted" to a full blown AI, which will then perform the scheduled flight.