Hi @Muneeza_Qureshi and welcome to the community 
can you share a little more about the infrastructure? are network policies active and maybe also share the generated service yaml?
you can use the nginx-ingress controller on EKS and only use a ELB to achieve this. i usually recommend this as you can configure a increased body size on nginx as well as TLS certificates with more that 2048-RSA, but of cause this choice is up to you