Found another possible hint that Han and Leia’s wedding was possibly filmed for ROTJ on Wookieepedia:
“It’s rumored that Star Wars: Episode VI Return of the Jedi originally ended with the wedding. It has even been said that these scenes were filmed but never used.[7]”
https://starwars.fandom.com/wiki/Wedding_of_Han_Solo_and_Leia_Organa