Since upgrading yesterday to v10.0 my LR Classic Windows desktop no longer syncs with my LR on iPad. I have rebuilt the sync data a couple of times and signed out and back into Creative Cloud a couple of times - all to no avail. This is really frustrating and renders LR unfit for purpose for my workflow at least.
For example, if I create a sync collection in LR Classic the collection does not appear on my iPad. Likewise if I create a new album in LR Mobile on my iPad and add photos to it, the album and its photos do not appear in LR Classic.