How to configure nginx-ingress and Digital ocean Load balancer to accept TCP traffic and route to pod

I have a digital ocean kubernetes and an ingress controller routing traffic. but one of the pods needs to accept TCP traffic; so i would like to make the ingress to accept the TCP traffic and route to the pod. i followed this

https://minikube.sigs.k8s.io/docs/tutorials/nginx_tcp_udp_ingress/

and

https://kubernetes.github.io/ingress-nginx/user-guide/exposing-tcp-udp-services/

after following, i still cannot connect to the port.

Below is what i have:

Load. balancer:

kind: Service
apiVersion: v1
metadata:
  name:  ingress-nginx
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
spec:
  selector:
    # app:  speed-transmission-app
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
  type:  LoadBalancer
  ports:
  - name: http
    port: 80
    targetPort: 80
    protocol: TCP
  - name: https
    port: 443
    targetPort: 443
    protocol: TCP
  - name:  transmission-port
    port:  9000
    targetPort:  8998
    protocol: TCP

config map

apiVersion: v1
kind: ConfigMap
metadata:
  name: tcp-services
  namespace: ingress-nginx
data:
  9000: "staging/speed-transmission-service:9000"

Now when i try to connect to the load balancer external IP at port 9000, i get connection lost.

I will really appreciate help on how to configure this. thanks.