The Mandalorian is like 90% Unreal Engine made backgrounds. The engine itself won't an issue.Last reports said that the pilot would apparently be made in Unreal Engine by Square. So this would follow a majority of the cutscenes made in 0.2, KH3, and MoM outside of things like the 0.2 and KH3 opening cinematics or that screenshot you provided. Whether they'll keep it like that when the pilot is done and they'll keep it like that for the rest of the series, or if they decide to change the CG software and use something that isn't Unreal Engine? We'll have to wait and see.