With pinggy.io you can share your Langflow instance from localhost with just a single command. Replace the port 7860 with the port where Langflow is running.
Pinggy will give you a URL like https://ranlkfsbjkxry.a.pinggy.link. Use this URL to open the flow editor from another machine, or to reach a flow you have exposed as an API.
A public flow editor is worth protecting. Turn on Password Protect in the settings above to put basic auth in front of the tunnel.
For the full walkthrough, see self-hosting Langflow and accessing it remotely.