Why the entrypoint be designed only support static configuration

Traefik Traefik v2
1

I use the traefik with the Gateway API, I could create a Gateway resource to describe the entry point. such as:

apiVersion: gateway.networking.k8s.io/v1alpha2
kind: Gateway
metadata:
  name: test-info-123-gateway-tcp-1000
  namespace: default
spec:
  gatewayClassName: traefik
  listeners:
  - allowedRoutes:
      kinds:
      - group: gateway.networking.k8s.io
        kind: TCPRoute
      namespaces:
        from: Same
    name: listener-tcp-1000
    port: 1000
    protocol: TCP

But this can not work, after reading the code, I know that must configure the entry point with address ":1000".