API Gateway quotas

We need to have an endpoint to receive http POST requests and send them to SQS with both headers and payload. API Gateway with REGIONAL type and SQS integration works great and satisfies our needs. However, we are slightly worried about the limits of 600 requests per second as it might not be enough for our case. Do we correctly understand that API Gateway HTTP API (that is not REST API with REGIONAL or EDGE types) can receive 10.000 requests per second, but in this case we would need to "build" our own integration to SQS (e.g. using lambdas)?