I don't know if anyone in Denmark has an official view on that, but I definitely do not have one. I think it will be very wise to stay away from that dispute and let Canada and the United States settle that by themselves, because the Northwest Passage as such is, of course, not a strait that is close to Greenland in any territorial or seabed dispute kind of way.
I think the Danish merchant ship that travelled through the Northwest Passage, which I mentioned in my intro, was following the pilot's rules, because as I remember it, the ship was hired by a Canadian company to put down cables on the seabed when it came to St. John's. So I think it was due to Canadian rules for these waters that the merchant ship transited through the area.
I don't think Denmark has any official view on how this dispute is going to be settled, so I will not dare to even go there.