I’ve released a plugin that enables Obsidian to sync fold states across devices. These folds are also known as creases.
Currently, Obsidian stores fold states within localStorage, which individualises these across devices. My plugin monkey patches all localStorage fold actions, and places them within the the sync-folds data.json file, which does sync between devices. Thus enabling consistent fold states across multiple devices.
Unfortunately the Obsidian team is the blocker here. High quality—necessary—plugins like this now get stuck in a sea of AI generated slop. It could be months just to have a review that rejects it. Personal opinions aside on how terrible the review process is, I suggest just manually installing it for now.