Currently there is only a single dashboard for ELB metrics, which charts metrics for 'classic elb' (aws.elb.metrics.* metrics).

We also collect metrics for application load balancers and network load balancers (aws.applicationelb.metrics.* and aws.networkelb.metrics.* respectively).

It's confusing for users who are collecting ALB or NLB metrics as to why they don't see any data in the ELB metrics dashboard, which doesn't specify which type of load balancer (it's just called "ELB Overview").