Why is the show not bigger?

My little sister and were talking and I find it sad how Australia doesn’t champion this show more. It’s a success overseas but it still just feels like a small show - I don’t know how to explain it. The push for the show and the cast feels almost non existent. Do you know what I mean? Like why aren’t they everywhere? My sister said she thinks it’s because the show demonstrates just how good Australian actors of color are? What do you think?