@TheRealQubix Apologies for late reply. Ads are triggered based on the Ads categories available in the Catalog file. For example, If catalog contains 4 categories for your region ( Personal Finance , Technology & Computing , Business and Education ). If you browse any website, if it falls under any of these categories then ads will be triggered. Please try this and revert back if you are seeing the same issue. I can redirect your question to Ads team they will check ads campaign for Germany and get back to you.
Thanks!