Kubernetes Ingress Nginx not forwarding to Services

Question

This is my ingress service config file.

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress-srv
spec:
  ingressClassName: nginx
  rules:
    - host: products.com
      http:
        paths:
          - path: /list
            pathType: ImplementationSpecific
            backend:
              service:
                name: products-srv
                port: 
                  number: 4000

Here, I am trying to pass all of my requests on products.com/list to the service products-srv. I've created a ClusterIP service as well.
After that, I've also added 127.0.0.1 products.com to the /etc/hosts file.
My problem is: When I am trying to access the products.com with my browser, then it is showing a 404 Not Found error. Anyone suggest me a solution please?