Gina Carano, who played Cara Dune in the first two seasons of The Mandalorian, is no longer a part of Lucasfilm.
They can simply restructure Rangers of the New Republic with a different lead character, while keeping the premise intact.
It seems safe to say Gina Carano was going to be a big part of this interconnected series of shows within the Star Wars universe.
Now, for those who have been following The Mandalorian, Gina Carano’s Cara Dune had, herself, become a Ranger of the New Republic. It stands to reason that her character was going to be a big part of that show.