Hey Olu! Sorry for not replying to you!
We finally tried another strategy by setting two ports for HTTP and gRPC, for example 8080 for web browsing and 8081 for gRPC. To solve the certificate issue, I added an envoy instance between external loadbalancer and tyk gateway instances. So it’s like LB => envoy => gateway:8081 => PSC to the backend service. envoy helps terminate SSL so gateway can handle the request properly.
This method is kinda “silly”, but it works and meet out requirements