There is a built-in mirror function in peergos you can use to mirror your user, or an entire server you control to another server yes: https://github.com/peergos/peergos?tab=readme-ov-file#mirror and we recently add this to the ui itself you can request/pay for a live mirror on another server: https://peergos.net

At the moment if your client accesses a server with a mirror, and your primary is offline, then you can read, but not write. Writes are proxied to your primary, and thus need your primary to be accessible.