Shuttle bus from DFDS terminal in Copenhagen to the train station

Hello, we will be arriving in Copenhagen on the DFDS boat from Oslo. I keep reading that there is an optional shuttle bus that we can book at the terminal to take into the city that drops us off near the train station, which would be great since that's close to our hotel. However, I have clicked on every link and option in our DFDS reservation, and I am not seeing an option to book this shuttle bus. Does it not exist anymore or am I missing something? And yes, I know we can just walk to a nearby train station after disembarking but the bus idea did seem slightly more convenient. Thanks!