My mom and I did this
ABD in July 2022. We had one pre-day in Bergen (mostly just to get a good night’s sleep) and one post-day in Oslo. We did the funicular in Bergen up to Mt. Fløyen and had lunch at the fish market in Bergen on the first official day before the welcome dinner and had a blast. The fish market has a lot of different food stalls. We got a bowl of steamed mussels, some shrimp scampi and a caviar sampler and really enjoyed it. There was also a cart selling fresh mini donuts that we got to take back to our hotel room. On our last day in Oslo we were pretty exhausted, but we went to the Munch museum (which we loved) and then had lunch at Koie Ramen nearby (which I also heartily endorse as a ramen lover).
In Geiranger, definitely make a point to visit the chocolate shop (Geiranger Sjokolade) for some of their fantastic truffles. We bought a box of 30ish and enjoyed them for a couple of weeks after returning home. They’re a bit pricey but well worth it.
Norway is BEAUTIFUL, have a blast on your ABD!!