Is it still selfhosted? If so I think I will be jumping on this ship

I like it. Use it to get around my CGNAT with StarLink (client running on home lab, docker client running on VPS with a docker instance of Nginx proxy manager joined to the netmaker client docker network so I can proxy back to my home lab).

did you try tailscale? they've been around for awhile and should be able to handle the same scenario