When the Lulusia Kingdom was destroyed in One Piece Chapter 1060, "Luffy's Dream," it seemed pretty straightforward. Fans may not have known precisely what happened, but that didn't matter. The takeaway was that the World Government had the One Piece world's equivalent to a Death Star, and they could erase any island that stood against them. However, Chapter 1089, "Hostage Situation," gave a few more clues to the nature of Lulusia's disappearance.
Source:https://www.cbr.com/one-piece-lulusia-fate-theory/