Anonymous Websocket not working, timeout

I'm trying to use devtunnels for testing from an Android device to a test server being developed on a cloud based dev machine I can't directly connect to that is running a web socket / signalR based service.

From my mobile device or a desktop machine, i just get a timeout trying to use an anonymous connection or connection with a tunnel auth header.
On the desktop machine i can get it to work if I use devtunnel connect and create a local persistent port to connect to, but there are no devtunnel commandline tools I can run on my android device to do the same thing

Is there another way to do this?
I hoped I could use devtunnel connect with a machine on my local network, and connect to it but the ports that devtunnels creates seem to only be accessible from the local host even if I try to open the port on my firewall.

side note: ngrok works without doing anything special all I did was run ngrok tcp and was able to use it from mobile or desktop

Start by reproducing the timeout from Android and desktop with an anonymous connection or tunnel auth header, then compare it with the working devtunnel connect setup and the ngrok tcp behavior described here. The issue names no source files or tests, and completion is not defined beyond finding a supported way for the WebSocket or SignalR connection to work remotely.