Data Action 429 during JMeter ramp-up for webhook integration

Need some help troubleshooting

Running JMeter 5.6.2 from Singapore. Simulating 200 concurrent requests to a custom Data Action via Genesys Cloud Architect. Hitting 429 Too Many Requests immediately on /api/v2/architect/dataactions/execute.

“Data actions are subject to platform rate limits.”

Is this a global limit or per-flow? JMeter shows consistent latency under 100ms before the throttle hits. Any config tweaks to avoid this wall?