Many ways around that these days. Dynamic DNS, CloudFlare tunnels, tailscale funnel, reverse SSH tunnels, etc

My setup uses a reverse proxy hosted on a free Oracle VPS that feeds through tailscale VPN, so it doesn’t really matter where the devices are connected, as long as they are connected to the tailscale VPN, the reverse proxy on the vps can serve the stuff

I run Plex and about 30 other things including my own website through it all without any issues