RDS For Oracle and Unicode Support

We want to manage Oracle databases in RDS for regions in Asia using Terraform. As per our understanding and the documentation page here: RDS for Oracle character sets - Amazon Relational Database Service . We need to be able to set the ‘NcharCharacterSetName’ variable in the API at the point of database creation.

Has anyone else hit this issue , should we raise an issue against the AWS provider and add the ability to manage this ? The parameter would be optional and Oracle specific.