Wow, so AWS is actually a better value for you than for most people. Being able to easily script and deploy your infra is hugely valuable when you have so much overhead.
We heavily use Elastic Beanstalk for dozens of running services, and it's amazing. We don't think about infra at all.
> for publishing something to the outside world from EKS
But why are you using Kubernetes at all? What problem is it solving for you?
See also: https://endler.dev/2019/maybe-you-dont-need-kubernetes/