According to the documentation you can view the history of elevation requests by filtering the logs with this:

labels.event="api.activateRole"

This works well to view the logs. If I attempt to create a metric from this, configured with a "unit" of "1" and save it, the metric graph will show nothing even though I can go to the logs and perform a query and observe results.

Is anyone aware of how to create a metric that can monitor usage of this feature? It would be great to see a visual graph of usage and, potentially, send an alert each time it is used.