Apple has withdrawn its Advanced Data Protection iCloud feature from the United Kingdom following government demands for backdoor access to encrypted...
But other than that, SyncThing isn’t a great replacement for iCloud Drive because you can’t choose what you download. So if I have 200gb in my ST folder I can’t sync it with my 128gb phone.
did you try to use syncthing’s filters?
I didn’t.
I must admit, I don’t really know how it all works and am mostly just blindly picking my way through, appreciating what works at this moment in time.