how to create multiple ingress port on Amazon EKS using single Application Load Balancer

there is requirement to create application load balancer with ingress or external traffic going to 2 different port for example port 80 and 81 into EKS Cluster, any sample yaml config file to setup this requirement ? we are trying to create the config using annotation with alb.ingress.kubernetes.io/group.name with two separate rules service port 80 and service port 81, but when trying to run the yaml file the second rules service is overwriting on the ALB Rules.

trying to create something similar with this post https://aws.amazon.com/blogs/containers/how-to-expose-multiple-applications-on-amazon-eks-using-a-single-application-load-balancer/ , but the differences is the requirement to have single services with 2 port [ingress]

Thanks