If I can hijack the thread a bit for a related question -- does anyone know of an easy selfhosted non-macOS server that will periodically pull full backups from iOS devices over Wifi (with the user's authorization on-device)? I think there's a lot of FOSS ground work for doing it on Linux, but hard to find good information about how to put it all together into a reliable automated solution, and sadly I don't really have the energy right now or dozens of hours to put into it.
I might even pay ~$100. I want it on Linux, but if it's under my control and reliable, maybe I could do Windows or macOS. Maybe I should just install iTunes on Windows in a VM...