Setting Up Mutual TLS in Phoenix for Google VPC Services

Hi friends, we are just setting up Phoenix in our Google VPC. Our compliance policy requires mutual TLS between internal services, and we are trying to figure out how to send traces to Phoenix over grpc with TLS. We found this relevant post: https://github.com/Arize-ai/phoenix/issues/6469, but the solution terminates at the ingress / load balancer layer. Is there a way to terminate TLS at the service layer, not just the ingress / load balancer layer?