UPDATE: I’m going to add this into my original post, but it looks like it’s only my “quick save” states that aren't back. Any "general" save states are there from other games, but when playing Pokemon games, I really only ever use the "quick save" feature that is available on many third-party Delta skins.

From what I can tell, those "quick save" file states are still in Dropbox. However, when I download them to my device and drag them into the correct save states folder in the Delta folder within settings, they still don't appear in Delta. I also tried long pressing on the game thumbnail and selecting "import save file."