HBO Max started in Germany two weeks ago, Trakt still barely shows any content.
The weird part is that Justwatch lists way more content than Trakt does. And when I’m aware of some content being on HBO Max, like The Gilded Age, I can hit the link on Trakt to update the JW information. Trakt will correctly update the data soon.
It really makes me wonder how frequently Trakt updates the data by itself.