Samsung is one of several major television manufacturers (including LG and Vizio) with its own proprietary operating system and ‘app store’.
This non-standard approach requires special custom apps to be developed followed by months of red tape for approval and distribution. Even then, it’s Samsung that decides which apps get distributed to which TV models.
We realize it’s a bummer to have to get a streaming device for your brand new TV, but it’s probably a better route in the long run anyways.