Katherine Langford as Rogue

I finally found my perfect fancast for the role of Rogue. I recently watched the series "Savage River" with the wonderful Katherine Langford. And how beautifully she plays “broken” characters. I think she would be perfect for the role of Rogue.
I know that Katherine Langford already played the role of the adult Morgan Stark, but it was in a deleted scene. So why not cast her as Rogue?