Synced collections don't appear in your regular Creative Cloud file view. Instead, you can view or share links to them them via a private lightroom.adobe.com site. However, the site only shows the currently synced collections, which means the links you share are ephemeral; if you unsync a collection or switch catalogs, anyone you've sent the link to will get a page-not-found error. People can comment on the photos, and the comments will sync back --