There's a good bump right next to Båstad (Sweden), "Hallandsåsen". We some times go there to ski (https://www.vallasen.se/), only 45 min from Copenhagen.Yes, I’m going Gothenburg to Copenhagen over 3 days as an event before an industry conference in Copenhagen afterwards. There isn’t much climbing but will be approx 160km a day
Are you going via Helsingborg - Helsingør (ferry) or via the Øresund bridge (train or car/bus). I hope you're going via Helsingør where you will start right next to the "Shakespeare castle" and go via the "beach road" (also sometimes referred to as "the danish reviera") to Copenhagen,