How to change the tunnel of the server`

I am completely new to this website, and I also don’t know how these sites like and ngrok manage to make a server public without port forwarding.
I have a Minecraft 1.19 server running on my windows laptop and have playit 0.8.1-beta version.I live in India, and want to change the tunnel to mumbai or if there is any in India.
I want to know how to change the tunnel. Thanks for the help!