I know that for a US patent I have to go on public pair to check the exchange between the patent examiner and patent attorney or inventor. But I'm looking for the same data for a german patent. I think it should be on espacenet, but I'm not able to figure it out.
At the depatisnet register. https://register.dpma.de/DPMAregister/Uebersicht?lang=en Search for the patent number then you can find the documents.