The centre caps are always a dealer fit. Same on my CS as I’ve ordered the dynamic caps too, which get put on once car arrives
Dealer fitted yes, but the factory will have left them in the boot for fitting. In the case of the Edition 50, I would presume the factory leaves a set of spinning GTI caps in the boot rather than the static VW set.
In your case, you should make sure that the dealers give you the original factory-supplied set too. Better you have them than the dealers.