I have a cluster in GKE and it is working, everything seems to be working. If I forward the ports I am able to see that the containers are working.

I am not able to setup a domain I own from namecheap.

These are the steps I followed

1. In Namecheap I setup a custom dns for the domain

ns-cloud-c1.googledomains.com.
ns-cloud-c2.googledomains.com.
ns-cloud-c3.googledomains.com.
ns-cloud-c3.googledomains.com.

I used the letter c because the cluster is in a c zone (I am not sure if this is right)

2. Because I am trying to setup as secure website I installed nginx ingress controller

kubectl create clusterrolebinding cluster-admin-binding \
  --clusterrole cluster-admin \
  --user $(gcloud config get-value account)

and

kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v0.46.0/deploy/static/provider/cloud/deploy.yaml

3. I applied the issuer.yml

apiVersion: cert-manager.io/v1alpha2
kind: ClusterIssuer
metadata:
 name: letsencrypt-prod
 namespace: cert-manager
spec:
 acme:
   # The ACME server URL
   server: https://acme-v02.api.letsencrypt.org/directory
   # Email address used for ACME registration
   email: example@email.com
   # Name of a secret used to store the ACME account private key
   privateKeySecretRef:
     name: letsencrypt-prod
   # Enable the HTTP-01 challenge provider
   solvers:
   - http01:
       ingress:
         class:  nginx

4. I applied ingress

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  namespace: staging
  name: ingress
  annotations:
  	cert-manager.io/cluster-issuer: "letsencrypt-prod"
spec:
  tls:
  	- hosts:
	  - www.stagingmyappsrl.com
	  - api.stagingmyappsrl.com
	  secretName: stagingmyappsrl-tls
  rules:
  - host: wwwstaging.myappsrl.com
    http:
      paths:
      - backend:
          serviceName: myappcatalogo-svc
          servicePort: 80

  - host: apistaging.stagingmyappsrl.com
    http:
      paths:
      - backend:
          serviceName: myappnodeapi-svc
          servicePort: 80

It seems that everything is created and working if I check in GKE website, but when I try to access I get DNS_PROBE_FINISHED_NXDOMAIN

I am not sure if I am missing an step or if I am setting up something wrong