Afaik you’d have to open a port and port forward for that to work, and you’d have to update every time your ip changes, unless you have a domain linked to it. There’s lots of other configurations, too: VPN/tailscale or equivalent onto your home network, a vps, reverse proxy, etc. I’ve yet to decide how to access from outside my home. Still tinkering locally, but mumble would be fun to try one day.