OSL international baggage claim is inside a secure area accessible only to arriving passengers. They want people to collect their bags and pass customs.



https://avinor.no/contentassets/3369...t-arrivals.pdf

Your (oversized) bags are probably lying at the service desk storage area (between yellow 24 and purple 23) awaiting their fate to go on the next flight to TOS that has space. Note that the space for ski equipment is limited in the cargo hold, so they probably are fitting it in to the next possible flight with space.