This is almost completely a result of artificial government imposed constraints that make ICE vehicles exceedingly more expensive there. It really has nothing to do with free market choice. A new Tesla Model 3 costs less than a Subaru Outback or Mini Cooper [0]. A VW eGolf also costs less than a base model ICE Golf.
[0] https://www.skatteetaten.no/globalassets/tabeller-og-satser/...