score:9
This question is a bit confusing by the order the OP shows the itinerary.
I assume the following:
I think Global Blue themselves show the answer (emphasis mine)
I purchased goods in an EU member state, and I am having a transit / connecting flight to my home country from another EU member state. How do I obtain Customs stamp?
For goods in your hold baggage get Customs stamp at the airport, where you initially check in for your flight. For goods in your hand baggage receive Customs stamp at your final point of departure from the EU.
So two:
Oresund bridge is irrelevant