According to this document https://docs.datadoghq.com/integrations/amazon_dynamodb/ we should be seeing
aws.dynamodb.throttled_requests, aws.dynamodb.throttled_requests, aws.dynamodb.read_throttle_events, aws.dynamodb.write_throttle_events
But we don't see it in Datadog Metrics/Monitoring. I read through the doc and don't see any specific configuration that needs to be enabled.