LTE gateway and outside access to HA

I set up an instance of HA on an RPi3. It connects to the net via a T-mobile cellular router. HA added the LTE gateway to my integrations page. I’m wondering how to connect to HA outside of the LAN. The gateway’s admin web page doesn’t give an ip4 address but lists a long ip6 address. It doesn’t show a way to forward ports either. Anyone have any experience with running HA under a similar gateway? Thanks.

Home Assistant Cloud or Cloudflared are possibilities.

To open ports you can sometimes contact the support to do it remotely. But without device or even your country noone can help you. Just use Google :wink: