SQS cannot publish messages to SNS. SQS can only store the messages. You have to pull the message using SQS Api’s.

Is AWS SNS guaranteed delivery?

Yes. Amazon SNS guarantees that each message is delivered to Amazon SQS at least once.

Does SQS guarantee delivery?

Q: Does Amazon SQS guarantee delivery of messages? Standard queues provide at-least-once delivery, which means that each message is delivered at least once. FIFO queues provide exactly-once processing, which means that each message is delivered once and remains available until a consumer processes it and deletes it.