Even that doesn’t really matter.
German packaging law does not apply to goods purchased on an overseas marketplace and imported by a German buyer. It only covers goods being made available for sale/purchased on a German marketplace.
So two identical items could be purchased by a German buyer.
Parcel 1 sold on Amazon.de and shipped from a UK seller in the UK to Germany. This should be covered by German packaging laws as it was made available and purchased on a German marketplace.
Parcel 2 sold on Amazon.co.uk and shipped from a UK seller in the UK to Germany. This is not covered by German packaging law because it was purchased on an overseas marketplace despite all other appearances and circumstances being identical…