That won’t happen on mint anytime soon. It may be somewhat achievable on ostree/OCI distros like fedora silverblue but even there it’s difficult.

I guess you simply want a backup and sync feature on the end user level. You could look into syncthing and sync whatever you want to have synced.

Is this like the thing where if you have a computer running Steam in your network, other computers download game updates from the first computer instead of over the internet?

I’d love such a feature on Linux, but I don’t think it’s happening anytime soon.

You might want to look at this one to sync your home folder: https://freefilesync.org/vision.php and then use ssh for system updates. There are no OSes that do this kind of synchronization except maybe NixOS.

It does. RTFM.