Wfm scheduling api 429 during jmeter ramp-up for 500 agents

Why is this setting causing immediate throttling when simulating bulk schedule updates? running jmeter from singapore against genesys cloud v2 api. targeting /api/v2/wfm/scheduling/schedules. simulating 500 concurrent agent schedule creations. hitting 429 too many requests right at the start of the ramp-up phase. retry logic with exponential backoff isn’t helping because the rate limit seems to be per-tenant or very low for this endpoint. checking the docs, it says standard rate limits apply, but 500 concurrent writes feels like it should be manageable with proper queuing. is there a specific header or pagination trick to bypass this for bulk operations? also noticed the websocket connection drops if i try to monitor real-time adherence while doing this load test. any insights on how to structure the jmeter thread group to stay within acceptable api throughput limits without triggering the 429s? currently using a constant throughput timer set to 50 rps but still getting blocked.