Troubleshooting Phoenix Server SSH Tunneling Issues on GCP

Hi Folks, I deployed the Phoenix server on GCP and I have IAP setup to secure the access to only people within the company. The transfer of traces to the {phoenix_server_collector_endpoint}:6006 is supposed to be done by using SSH tunneling from developer's workstation to the server (we use the server for a PoC and don't collect traces from the conversational apps yet). The SSH tunneling is done this way. It maps the localhost:6006 --> {phoenix_server_collector_endpoint}:6006 and any trace that is sent to localhost:6006 is supposed to be sent to the actual deployed server's endpoint. The issue is that when I set the os.environ["PHOENIX_COLLECTOR_ENDPOINT"] = "localhost:6006" or when I use px.Client(endpoint="http://localhost:6006").log_evaluations() in a notebook the client library creates a new local server and logs the traces there. So, when I open localhost:80 I can see the traces visualized but when I open localhost:6006 or {phoenix_server_collector_endpoint}:6006 I don't see anything. Do you have any idea what's going on here?