Getting no response when trying to curl inside a pod to a service.

Got 2 deployments, front React app and back nodejs serving express app.

Everything works like a charm on local development or even with docker-compose up. In production are served isolated on 2 different hosts so using an environment variable to set in frontend nodejs server url in order to set axios baseURL to fetch data from.

When I try to deploy those into kubernetes cluster front is served ok, can join and everything look ok since tries to login for example.

Can't connect to backend front frontend, looks like something is bloking the connection but can't figure out what, yet.

Both deployment and service .yml files look ok.

I tried everything here: How to connect front to back in k8s cluster internal (connection refused) but still stuck, not able to get even ping from backend service at all.

Any help will be appreaciated!