I have a Mac running macOS 12.7.6 and two iOS 18.1 devices (iPad and iPhone) and I would like to sync the bookmarks between them. I also have a Windows machine with a Firefox plugin to sync the bookmarks (I can live without this, but doesn’t seem to be the cause of any breaking). This was mostly working, with the only issue being sometimes it would be slow to sync, or if I added a bookmark on two devices near the same time it would be confused and might not add them correctly (wrong order maybe or not add them until a third bookmark would force the sync).
I recently imported a large bookmarks folder (several hundred bookmarks, 2500-line long HTML backup file), and started reorganizing them all. This broke my iPad bookmarks, forking it into a different syncing state. At this point, my Mac, iPhone, and Firefox all synced correctly. I then tried the various solutions online, turning off and on the Safari iCloud sync, rebooting, deleting all bookmarks and trying to add only one bookmark, and deleting the Safari iCloud storage. When I did this step there were two, slightly differently sized (814 KB vs 868 KB or something; compared to my ~200 KB bookmark backup) I tried to delete these to force a restart but since Safari has not returned to the iCloud storage management page, even if I have the syncing turned on. Currently, all devices no longer sync at all.
Ultimately I want to fix the bookmarks, requiring resetting my broken Safari somehow, does anyone know any fix for this?
Also, iCloud tabs do work across my devices, so it must be syncing something.