This page on Diana's website lists various countries and how to watch the series there. It looks like it hasn't been updated for Season 4, but the main takeaway is really the explanation of how the show gets distributed around the world. There's a thorough explanation on the page, but tl;dr, Sony is the one who sells the show to international markets, so they're the ones you need to contact about how to watch the show in your country.

dianagabaldon.com/other-projects/outlander-tv-series/where-to-watch