https://arstechnica.com/tech-policy/2019/01/patent-issues-force-apple-to-halt-iphone-7-and-8-sales-in-germany/

Apple has suffered another blow in its global patent battle with Qualcomm as it was forced to pull older iPhones from its shelves in Germany. Currently the German Apple store offers the iPhone XS and XR but not the iPhone 7 or iPhone 8.

Qualcomm says Apple was forced to pull its older smartphones due to a December 20 patent ruling in Qualcomm's favor.