Can I use ngrok on mineos?

I dont have access to my router so ngrok is the only way to make my server online.

I don’t see why it wouldn’t work. You’d need two services if you want to remotely access the WebUI.

You could just run a server remotely on oracle cloud using their arm architecture for free. It’s running SkyFactory 4 with a few people on it, sometimes at the same time.

edit - maybe one, depends on what 1 online ngrok process and 8 tunnels / ngrok process actually means.