During Star Wars Celebration Chicago 2019, Daisy Ridley revealed that Luke’s lightsaber “lives” in Star Wars: The Rise of Skywalker, and director J.J. Abrams alludes to some new force powers Rey might use in the movie.
Moderator Stephen Colbert asks Ridley, “Rey has crazy-strong force powers now, but her lightsaber’s in pieces. Is she rebuilding that lightsaber, or are we in a start-from-scratch situation here?”
Ridley responds, “My answer is not the end of the story… but the lightsaber that Rey inherited from Luke lives.” This could suggest she either rebuilds the broken saber, or as many fans have theorized, retrofits it to her own staff.
“That’s me with a stick.” – Daisy Ridley
Source: IGN.com Luke's Lightsaber 'Lives' in Star Wars: The Rise of Skywalker