Resolving issue related to Docker desktop and Kubernetes could be tricky but most of the time the logs will be handy to find the cause and then finding the fix for it.
You do not need to create SSO in different AWS account to restrict or Deny permissions to users for different services especially IAM and SSO itself.
You can use PowerShell to create a key vault and secrets and assign access policy to users, groups or Apps.
Using Presigned URL, the S3 objects can be accessed securely in PowerBI for limited time.
The contents of a file uploaded to S3 bucket can be accessed via Postman using RestAPI.