Amazon Simple Queue Service (SQS) queues are not protecting the contents of their messages using Server-Side Encryption (SSE).
In AWS Console -
In Terraform -
References:
https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-server-side-encryption.html
https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/sqs_queue#kms_master_key_id