Yeah, the technology is called Respeecher and they also used it for Luke in The Mandolorian and The Book of Boba Fett, since Mark Hamill now sounds very different from how he sounded in the '70s and '80s. Hell, there's a similar technology called Sonantic that has been used to recreate Val Kilmer's voice, as his battle with throat cancer has left his real voice very gravelly and difficult to understand.