Nginx – Kubernetes Ingress to domain

I’m new to kubernetes, actually I started 1 week ago and I’m trying to use Ingress to see the application using a domain name but no matter what I’ve done I haven’t been able to get it to work. My yaml file has the following format and when I apply it, it runs normally and doesn’t show me any errors.

apiVersion: v1
kind: Namespace
metadata:
  name: my-namespace
  
---

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-app-deployment
  namespace: my-namespace
spec:
  replicas: 2
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:latest
        ports:
        - containerPort: 80
        
---

apiVersion: v1
kind: Service
metadata:
  name: my-app-service
  namespace: my-namespace
spec:
  type: NodePort
  selector:
    app: nginx
  ports:
  - protocol: TCP
    nodePort: 32000
    port: 80
    targetPort: 80

---

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: my-app-ingress
  namespace: my-namespace
spec:
  ingressClassName: nginx
  rules:
  - host: xxxx.xxxxxx.com
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: nginx-service
            port:
              number: 80

When I try to browse the application using the nodePort http://??.??.??.??:32000/ I can view the contents of the application but when I use the domain name I get the error message "This site can’t be reached".

I have spent too many hours and I can’t find what the problem is. Can someone tell me what is wrong with my configuration.

Thanks in advance