Hi folks, I'm the author of inlets and openfaas. I wrote this article to explore the three options I see for exposing a K8s cluster from a private network for remote access. There's also a disclaimer in there, about checking if your distribution can be exposed publicly. For something like K3s, it's made to be run on the Internet, but they do still have a few recommendations:
https://rancher.com/docs/k3s/latest/en/installation/Feel free to try out the steps in the post, or hit me up on Twitter @alexellisuk to chat.
Alex