And disappointedly Madurodum does not have trams there!
The display is designed and constructed by Legoland staff. But I suspect there was a lot of input from the Fehmarn organisation (I think they also did a bit of financial funding, or maybe that's just individual building and dredging companies). I've actually seen random tourists discuss how car focussed some of the display is...
https://femern.com/da/presse/nyheder/to-transportministre-abner-kaempe-lego-udstilling/

Transportministrene Thomas Danielsen og Claus Ruhe Madsen, Slesvig-Holsten, indviede mandag den 23. juni en ny 250 kvm stor udstilling om Danmarks største infrastrukturprojekt i LEGOLAND i Billund. LEGO modellerne i den nye attraktion viser byggeriet af verdens længste sænketunnel – Femern Bælt-tunnelen – og skal inspirere børn og unge gennem leg og læring til at overveje en uddannelse inden for byggefagene.