What are you trying to do
I'm running EKS on AWS and want to associate the service account created by HAProxy Ingress to a role in AWS, having something like this in my values.yaml:

serviceAccount:
  annotations:
     eks.amazonaws.com/role-arn: "arn:aws:iam::111111111111:role/some-role-name"

What HAProxy Ingress should do or how it should behave differently
HAProxy Ingress does not support adding annotations to the created ServiceAccount in this way. There are probably alternatives to this approach: maybe overwriting template files or predefining a ServiceAccount connect it using its name. Those approaches would require more setup though and are therefore less ideal in my opinion.