In the default configuration, you cannot see the metric for each queue, because the metrics are aggregated. For example, you have two queues named qq1 and qq2. There are 2 and 3 messages in the qq1 and qq2 respectively.
But you should see the total messages are 5, not the amount of the message is 2 for qq1 and the amount of the messages is 3 for qq2 separately.