AWS Aurora Database metric support in CloudWatch plugin

We are creating dashboards to show AWS CloudWatch metrics for Aurora database. When selecting AWS/RDS namespace there is bunch of metrics shown on the drop down list, but e.g. “ServerlessDatabaseCapacity” -metric is not found. It is found in AWS management console at CloudWatch Metrics -view and metric shows there some data points as expected.

We are using Grafana 6.5.1. How do I know which metrics are supported by current CloudWatch plugin ? And is “ServerlessDatabaseCapacity” -metric supported by some later version of Grafana/CW plugin ?