How to add server_header_transformation in kind: EnvoyProxy

*Description*:
>Describe the desired behavior, what scenario it enables and how it
would be used.
I want to remove server: nginx/1.27.1 header on on my response header. I am using envoy-gateway. I want server_header_transformation this to be applied globally.
[optional *Relevant Links*:]
>Any extra documentation required to understand the issue.

Below i have attached my configuration. It did't works but need some experts guidelines.

`apiVersion: gateway.envoyproxy.io/v1alpha1
kind: EnvoyProxy
metadata:
name: external-proxy-config
namespace: gateway
spec:
bootstrap:
type: Merge
value: |
static_resources:
listeners:
- name: listener_0
address:
socket_address:
address: 0.0.0.0
port_value: 8080
filter_chains:
- filters:
- name: envoy.filters.network.http_connection_manager
typed_config:
"@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager
stat_prefix: ingress_http
server_header_transformation: PASS_THROUGH
server_name: none
route_config:
name: local_route
virtual_hosts:
- name: local_service
domains: ["*"]
routes:
- match:
prefix: "/"
route:
cluster: some_service_cluster
clusters:
- name: some_service_cluster
connect_timeout: 0.25s
type: STRICT_DNS
lb_policy: ROUND_ROBIN
load_assignment:
cluster_name: some_service_cluster
endpoints:
- lb_endpoints:
- endpoint:
address:
socket_address:
address: 127.0.0.1
port_value: 19000
provider:
type: Kubernetes
kubernetes:
envoyDeployment:
replicas: 1
container:
resources:
requests:
cpu: 150m
memory: 640Mi
limits:
cpu: 500m
memory: 1Gi
envoyHpa:
minReplicas: 1
maxReplicas: 3
metrics:
- resource:
name: cpu
target:
averageUtilization: 30
type: Utilization
type: Resource
envoyService:
externalTrafficPolicy: Local
type: LoadBalancer
annotations:
service.beta.kubernetes.io/aws-load-balancer-nlb-target-type: ip
service.beta.kubernetes.io/aws-load-balancer-scheme: "internet-facing"`