Glad hilliard001’s got the info needed. I clicked on the SJ link and couldn’t find the Svenska/English change button for awhile - maybe that’s just me. The Vy Website was easier For changing languages, for those of us who need it. But they cover both train and bus schedules in Scandinavia, and don’t have an arrival option for a Stockholm train station. So I see why it won’t work in this case, for this journey.
But just saying avoid made it sound like the formerly NSB/now Vy site was somehow risky or dangerous, and to not ever be consulted at any cost. It’s just not applicable here, even though the departure is from Oslo. Good to know.