Load balance internal service without exposing it outside

Currently, I have a frontend , backend , and tf-serving service. My current configuration exposes both frontend and backend services outside.

The service tf-serving , however, is an internal service only used by the backend service. They communicate using the gRPC API provided by TensorFlow Serving.

Would it be possible for tf-serving to be load balanced too such that when I call it from the backend service, Traefik will load balance it for me?

BTW: I deploy these containers on a docker swarm with 10 VMs.