Create separate IAM policies (or Amazon S3 and DynamoDB access with the required permissions. Attach both IAM policies to the EC2 instance profile. Use role-based access control (RBAC) to control access to Amazon S3 or DynamoDB (or the respective EKS Pods.

Create separate IAM policies (or Amazon S3 and DynamoDB access with the required permissions. Attach the Amazon S3 IAM policy directly to the EKS Pods (or the data services and the DynamoDB policy to the EKS Pods for the U1.

Create separate Kubernetes service accounts for the U1 and data services to assume an IAM role. Attach the Amazon S3 Full Access policy to the data services account and the AmazonDynamoDBFullAccess policy to the U1 service account.

Create separate Kubernetes service accounts for the U1 and data services to assume an IAM role. Use IAM Role for Service Accounts (IRSA) to provide access to the EKS Pods for the U1 to Amazon S3 and the EKS Pods for the data services to DynamoDB.