A VPN lets your device connect through another country, so you can browse the catalogue there. Check your streaming service's terms first — some don't allow it.
Your services — showing everywhere they carry it, deselect what you don't have
Amazon Prime Video
Amazon Video
Amazon Prime Video with Ads
ARD Plus Amazon channel
FlimmerkisteTV Amazon Channel
ARD Plus
ARD Plus Apple TV channel
Magenta TV+
Apple TV Store
Streaming availability data provided by JustWatch.