Self host FreshRSS, use the GReader or Fever API link that’s built into FreshRSS to sync to other apps on your local network. If you want to access the sync remotely, use Tailscale or setup Wireguard. I personally just run Wireguard in OpenWrt
There is no need to expose FreshRSS to the internet
Idk about the rest of the world, but most people I know in the US seem to stay in their hometown or a nearby town