AWS ELB does not have any HTTPs listener enabled for external traffic. In-transit data may be prone to MiTM attacks.
In AWS Console -
In Terraform -
References:
https://docs.aws.amazon.com/elasticloadbalancing/latest/userguide/data-protection.html
https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/elb#lb_protocol