The leaks for TROS said the original plan was for Luke and Leia to appear as force ghosts on Exegol. I’ve heard some people say they would appear alongside Ben and Rey (as Ben wields Luke’s saber and Rey wields Leia’s saber) but I think the leaks specifically outlined that they wouldn’t appear until Palpatine started lighting blasting Rey. They would stand by her and help shield her and take down Palpatine. Eventually this was scrapped for the Jedi voices scene. I doubt we’ll get this as a deleted scene but it would be nice.