Architect API 429s during IVR load test

Trying to understand why POST /api/v2/architect/flows returns 429 after 10 requests/sec in my JMeter script against Genesys Cloud BYOC Edge 24.1.0 in Asia/Singapore. The Genesys Docs mention higher limits for bulk operations, but the standard rate limit seems to apply here. Is there a specific header or endpoint to bypass this during capacity planning tests?