I guess I’m a dummy, because I never even thought about this. Maybe I got lucky, but when I did restore from a backup, I didn’t have any issues. My containerized services came right back up like nothing was wrong. Though that may have been right before I successfully hosted my own (now defunct) Lemmy instance. I can’t remember, but I think I only had sqlite databases in my services at the time.
I have tried KDE connect, and it never works when I need it to. I just send it to myself on Signal. It’s the easiest, most non-bullshit way.