We can use awscli command to list all instances from all regions across multiple AWS accounts using multiple profile names.
Use AWS SSO to Deny permissions for IAM and SSO itself
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.
How to create Azure Storage Account with REST API using Postman
Storage Account RestAPI PUT call can be used to create storage account using Postman