Migrating confirmed emails from different system to SNS

Hello.

Amazon SNS requires confirmation of subscription before receiving messages, so I don't think it's possible to not resend the confirmation email.
https://docs.aws.amazon.com/sns/latest/dg/sns-create-subscribe-endpoint-to-topic.html

HTTP(S) endpoints, email addresses, and AWS resources in other AWS accounts require confirmation of the subscription before they can receive messages.