I'm travelling with SJ to and from Oslo, and on SJ's own website the information about arrival times is only written as specified in the schedule for stops in Norway. When travelling with the EuroNight service to Denmark and Germany I was able to see this information through Banedanmark and Deutsche Bahn, but with Norway I haven't been able to find any equivalent. There is https://www.vy.no/trafikk-og-ruter/rutetider, but it only includes Vy trains. It says to check Go-Ahead and SJ NORD's websides for information about their trains, but nothing about SJ itself.
Is there anywhere I can see up-to-date departure and arrival information about SJ trains in Norway?