Hi @GowthamR,
I believe it's only for the roles associated with UC. I was going through this community post on including self-assume capabilities for AWS IAM roles and it's mentioned that this change does not affect storage credentials that are not created using IAM roles, and it should not affect those who are not using UC on AWS.
Moreover, to verify if a storage credential is correctly configured as self-assuming, โโfollow Step 4: Validate the storage credential in the Unity Catalog AwsIamRole documentation.
Cheers!
Riz