Terraform data source lookup by name failing for existing Data Actions

Trying to reference an existing Data Action in my Terraform module using a data source. The resource is already deployed in Genesys Cloud. I’m using genesyscloud_data_action with a name filter, but the plan fails with no resource found. The name matches exactly.

resource "genesyscloud_data_action" "this" {
 name = data.genesyscloud_data_action.existing.name
}

Is the provider case-sensitive or is there a delay in indexing? Stuck on this.