WFM API 403 Forbidden on Quality Evaluation Creation via Multi-Org AppFoundry

My current config is completely failing as expected for our latest AppFoundry deployment targeting the Quality Management module. We are building a premium integration that automatically creates quality evaluations based on post-interaction data from Architect. The application uses multi-org OAuth tokens and has been granted full WFM and Quality permissions in the partner portal. However, when the backend service attempts to POST to /api/v2/quality/evaluations, we consistently receive a 403 Forbidden response with the error code forbidden. This occurs despite the token being valid for other WFM endpoints like schedule reads. The request payload matches the schema defined in the API documentation, including the correct evaluationType and scorecard ID. We have verified that the user associated with the token has the Quality Evaluation permission set to Full Access. The issue persists across multiple tenant environments in the PST timezone. We are using the standard Genesys Cloud REST API client library version 3.1.0. Has anyone encountered a specific permission gap or API versioning conflict that causes 403 errors on Quality evaluation creation when using multi-org AppFoundry tokens?