Although Return of the Jedi concludes the original Star Wars trilogy with a Rebel victory, the destruction of the second Death Star presents potentially catastrophic problems for the Forest Moon of Endor. This issue is addressed in-universe in the original Legends continuity, but the canon-exclusive Star Wars: The Rise of Skywalker seemingly makes matters worse for the new continuity in its depiction of the Death Star II’s wreckage, reopening the discussion regarding Return of the Jedi’s ending. Like Legends, the current Star Wars canon also addresses the aftermath of the battle station’s destruction, attempting to mitigate the potentially dark implications of the Rebellion’s victory.

https://screenrant.com/star-wars-return-jedi-endor-holocaust-theory/