I just released Configmesh this week. It's a macOS app (with CLI companion) for e2e encrypted syncing and backing up of dotfiles and application configurations. You can sync for example stuff from ~/.config/, Application Support, *.plists, and so on, and add config sync to apps that don't support it natively
Fresh off the press
https://configmesh.app/
Demo: https://www.youtube.com/watch?v=EeA4TTpM2wk