Terraform data source lookup failing for named Genesys Cloud resources

Trying to understand why genesyscloud_routing_queue data source returns Error: No matching resource found despite correct naming.

  1. Define data source with name = "Support Queue".
  2. Run terraform plan.
  3. Error occurs: unable to find resource.

The queue exists in the org. Is name matching case-sensitive or does it require exact ID lookup? How do I debug the underlying API call?