iOS does not support true multitasking, and therefore does not support background synchronization.
Note that you don’t have to synchronize all of your projects to all of your devices. I keep a small notetaking project in the Dropbox/Apps/Scrivener/Notes folder, and synchronize only that folder to my phone. My larger projects, which I want on my iPad, are one level up, in Dropbox/Apps/Scrivener.
I love this idea. As a longtime Mac and Scrivener user, this would improve the overall user experience and stability. While Dropbox works Intel Macs but it has been a nightmare on my M1. It would also save me money.
Thank you so much, Keith. I do appreciate all of your hard work and dedication. As to the Packages in the Files app, It occurs to me that Apple may have eliminated that issue. I say that since I also use Apple’s Logic Pro X, which, along with FinalCut Pro is now fully functional on the iPad. My Logic Files are packages and I can seamlessly sync between my M1 MacBook Pro and my iPad.