Message Transformation in SNS

Hello.

It may depend on the content of the message, but I think you can use the SNS filter policy to change the content before sending it to SQS.
https://docs.aws.amazon.com/sns/latest/dg/sns-subscription-filter-policies.html

Alternatively, you can also use a configuration where Lambda is launched from SNS, the message is edited, and then the message is sent to SQS.
https://docs.aws.amazon.com/lambda/latest/dg/with-sns-example.html