DataDog Monitoring of Kafka Http Sink Connector Metrics

Question

We are having issue in monitoring Kafka Connect Sink Metrics in Datadog. Details below:

Context: Monitoring the Kafka Connect Sink Metrics
Datadog-agent Version: 6.x
Kafka Version:0.10.0.1
Configuration: Updated Metrics.yaml file on the datadog-agent(/etc/datadog-agent/conf.d/kafka.d/metrics.yaml) as below and restarted the datadog:
 #
   # Kafka Sink Connector stats
   #
    - include:
       domain: 'kafka.connect'
       bean: 'kafka.connect:type=connector-metrics,connector="HttpSink"'
       attribute:
         status:
           metric_type: gauge
           alias: kafka.httpsink.connector.status

    - include:
       domain: 'kafka.connect'
       bean: 'kafka.connect:type=sink-task-metrics,connector="HttpSink",task="*"'
       attribute:
         sink-record-read-total:
           metric_type: rate
           alias: kafka.httpsink.connector.rate

DataDog Metrics Explorer:  Not able to search this metric:kafka.httpsink.connector.rate/
kafka.httpsink.connector.status