Currently we can only use aws-sdk ^2.744.0 in workflow custom code actions. This version is entering maintenance mode and end-of-support very soon:
(node:31876) NOTE: The AWS SDK for JavaScript (v2) will enter maintenance mode
on September 8, 2024 and reach end-of-support on September 8, 2025.
Please migrate your code to use AWS SDK for JavaScript (v3).
For more information, check blog post at Announcing end-of-support for AWS SDK for JavaScript v2 effective September 8, 2025 | AWS Developer Tools Blog
When can we expect V3 of aws-sdk to be available?