Way to go DSB 🤣
On your *national* website you have Hamburg ZOB listed, and that's the Zentralomnibusbahnhof (bus station) (pic 1, 2)
To get a train to Hamburg Hbf, the main station, you need to use the DSB International website (pic 3) https://www.dsb.dk/en/international/
But to Flensburg - which is in Germany - *is* on the national site. Totally makes sense (pic 4)



