why doesn't my treaty port have market access?

https://preview.redd.it/ng7ydzxnqvtg1.png?width=605&format=png&auto=webp&s=1946544f0baf987737212d0206130121add71dad

https://preview.redd.it/8onhnapwqvtg1.png?width=584&format=png&auto=webp&s=a5bc4cd644a54034da449fc058a9a39d79ee91a5

am I misunderstanding something, I have 4 ports and like 18 trade centers, why doesnt my treaty port have market access?