Is it saved as a Favorite? There seems to be in issue with those. I haven’t been able rearrange them, nor can I edit the name. For bookmarks in other folders, tap the 3 dots go to bookmarks at the top, find the bookmarks and long press for the menu, then tap edit
That’s it.. bookmarks in Favorites are locked down, no editing. Other folders seem to be normal.
As a work-around I re-saved the bookmark into Favorites with a better name, and now it’s synced correctly to my iPad and iPhone (no access to my Mac right now), and I’m finding all newly saved bookmarks to Favorites can not be reordered either. The others that were previously saved can be reordered. Also, the favicon of Favorites bookmarks do not refresh either
I’ll report these Bookmarks management bugs to Apple shortly
Once I get to my Mac in a few days, I hope I can fix it up there in macOS 26
Thanks for confirming @dcp10