Sync to iCloud

I use scrivener nearly every day, on iOS and macOS. I write novels and nonfiction, sometimes for me, often for others as ghostwriter. My wish is that it would sync properly on iCloud.
Dropbox has become increasingly unfriendly, restricting accounts to 3 machines and becoming a bloated do-all mess. I’m seriously considering terminating my relationship with Dropbox, already removing from 2 of my devices, leaving 2.
Please, if possible, consider an iCloud-friendly format.
Thanks for hearing me out,

If you search the forum you will find there is a lot of discussion about this, and the technical difficulties. See this, for example: