aws sns set-subscription-attributes

aws sns set-subscription-attributes \
--subscription-arn arn:aws:sns:us-east-2:123456789012:MyEndpoint:1234a567-bc89-012d-3e45-6fg7h890123i
--attribute-name RedrivePolicy
--attribute-value "{\"deadLetterTargetArn\": \"arn:aws:sqs:us-east-2:123456789012:MyDeadLetterQueue\"}"

Related

• Configuring an Amazon SNS dead-letter queue for a subscription

aws sns [ publish | subscribe | list-subscriptions | create-topic | set-subscription-attributes ]