I made some drawings on the iPad while being offline (under the Aufgabe 3 and Aufgabe 4 headings). The drawing fields were there before, that’s why you can see them on the mac. But the drawing itself did not sync after the iPad went back online. I then wrote some Text to force it to sync and this text synced but the drawings still did not change.
Edit: Just realized the drawings got synced to my iPhone correctly, so it seems to be just an issue with the macOS version.