GKE - Troubleshoot Error SSL Certificate Provisioning, Failed Not Visible

I deployed a web application which is hosted both in Google Cloud and in another server. The website, imagine it is "www.example.enterprise.com", has the domain "enterprise.com" in a different server than the subdomain "www.example.enterprise.com", which is in Google Cloud. The website needs 2 ports opened, the 80 and the 3000 to control Google login. I use Google Kubernetes Engine to run the Docker image. I reserved a static IP and I linked it to the subdomain.

I'm struggling to get the SSL certificate work properly as I still get the message that the certificate is provisioning and that the domain status is "Failed Not Visible". I need the website to be HTTPs as it requires Google authentication.

I updated the DNS records today but it has already passed 5h since. How much should I need to wait?

I'd like to know if I have configured the DNS settings correctly, that's why I attach an image from Google Cloud DNS and I also attach the Kubernetes YAML files, which I suppose are correct as I followed the official documentation.

SSL certificate

apiVersion: networking.gke.io/v1kind: ManagedCertificatemetadata:  name: example-managed-cert  namespace: productionspec:  domains:    - www.example.enterprise.com 

Ingress

apiVersion: networking.k8s.io/v1kind: Ingressmetadata:  name: example-ingress  annotations:    kubernetes.io/ingress.global-static-ip-name: example-ip    networking.gke.io/managed-certificates: example-managed-cert    ingressClassName: "gce" # controladador de Ingress integrado de Google Kubernetes Engine  namespace: productionspec:   rules:  - host: www.example.enterprise.com  - http:      paths:      - path: /        pathType: Prefix        backend:          service:            name: example-service-general            port:              number: 80      - path: /oauth2callback        pathType: Prefix        backend:          service:            name: example-service-auth            port:              number: 3000

Services

apiVersion: v1kind: Servicemetadata:  name: example-service-auth  labels:    name: example-service-auth    app: example  namespace: productionspec:  type: NodePort  selector:    name: example-pod    app: example  ports:    - name: port-general      port: 3000      targetPort: 3000      protocol: TCP

apiVersion: v1kind: Servicemetadata:  name: example-service-general  labels:    name: example-service-general    app: example  namespace: productionspec:  type: NodePort  selector:    name: example-pod    app: example  ports:    - name: port-general      port: 80      targetPort: 80      protocol: TCP