I can't route traffic from one namespace to the namespace that holds the eggress gateway

Networking
1

I just started with Istio but for some reason there is something confusing in the documentation that I don’t understand.

I am using this configuration :

apiVersion: networking.istio.io/v1alpha3
kind: ServiceEntry
metadata:
  name: test
spec:
  hosts:
  - test.com
  ports:
  - number: 443
    name: tls
    protocol: TLS
  resolution: DNS

apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  name: istio-egressgateway
spec:
  selector:
    istio: egressgateway
  servers:
  - port:
      number: 443
      name: tls
      protocol: TLS
    hosts:
    - test.com
    tls:
      mode: PASSTHROUGH
---
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: egressgateway-for-binance
spec:
  host: istio-egressgateway.istio-system.svc.cluster.local
  subsets:
  - name: test
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: direct-binance-through-egress-gateway
spec:
  hosts:
  - test.com
  gateways:
  - mesh
  - istio-egressgateway
  tls:
  - match:
    - gateways:
      - mesh
      port: 443
      sniHosts:
      - test.com
    route:
    - destination:
        host: istio-egressgateway.istio-system.svc.cluster.local
        subset: test
        port:
          number: 443
  - match:
    - gateways:
      - istio-egressgateway
      port: 443
      sniHosts:
      - test.com
    route:
    - destination:
        host: test.com
        port:
          number: 443
      weight: 100

My egress-gateway is in a namespace named ‘istio-system’, along wtih istiod. I want to deploy a set of pods and route their https requests through the istio egress gateway in istio-system namespace. These set of pods are deployed in the sleep-test namespace. When I apply these manifests on the sleep-test namespace, requests won’t go through the istio-system namespace egress gateway. What I’m missing ? Do I have to specify somehow the namespace in where the egress trafic originates ? Thanks