Get gateway and virtualservice not found

Hi,
I’m not able to retrieve gateways and virtualservices via the commands

kubectl get gateway
kubectl get virtualservice,
kubectl -n istio-system get gateway
kubectl -n istio-system get virtualservice

the result is No “No resources found.”

NAME REVISION UPDATED STATUS CHART APP VERSION NAMESPACE
istio 1 Wed May 22 03:50:37 2019 DEPLOYED istio-1.1.0 1.1.0 istio-system
istio-init 1 Wed May 22 03:50:16 2019 DEPLOYED istio-init-1.1.0 1.1.0 istio-system

Client Version: version.Info{Major:“1”, Minor:“13”, GitVersion:“v1.13.0”, GitCommit:“ddf47ac13c1a9483ea035a79cd7c10005ff21a6d”, GitTreeState:“clean”, BuildDate:“2018-12-03T21:04:45Z”, GoVersion:“go1.11.2”, Compiler:“gc”, Platform:“darwin/amd64”}
Server Version: version.Info{Major:“1”, Minor:“12”, GitVersion:“v1.12.7”, GitCommit:“6f482974b76db3f1e0f5d24605a9d1d38fad9a2b”, GitTreeState:“clean”, BuildDate:“2019-03-25T02:41:57Z”, GoVersion:“go1.10.8”, Compiler:“gc”, Platform:“linux/amd64”}

probably not in same namespace