Earlier quoted context omitted.
Sometimes you can't even buy (or rent) the content because of georestrictions. At least I often encounter TV shows and movies that are available in some US streaming service, but are not available in our version of the same service, or the entire service is not available.
You can purchase abroad and ship to your country. Amazon for example has country local stuff. Use the .xy for whichever country you want to search in (.com for US, .de for Germany, etc) and see if they have what you want. They may also ship to you internationally.
Just looking at a couple of shows that I watched a year ago, I couldn't actually find any of them on Amazon.de. And actually, only found one on Amazon.com, where it was unavailable. Also, the Chinese version for some reason?