Atleastforme I'd like to have a directory watcher syncing updated/new files automatically similar to the camera syncing.
I'll look for a custome solution (syncing it first to my raspberry pi and then to proton drive) once I have my new phone.
It’s okay for like the occasional individual file save. I tried a bulk transfer and wound up losing half my iCloud files. Also I frequently get errors when trying to save to there on iOS.