Function Execution Count metric should be present in MDM when on app service plan

If you go into the Azure Portal and browse to Monitor->Metrics and then select your function app, one of the metrics you can view is Function Execution Count. However this metric is only populated for function apps in the consumption plan. A function app on an app service plan will show zero executions.

This makes it difficult for users to add an alert that would fire if there are no executions. They can probably achieve a similar goal through App Insights but it would likely involve writing a custom query which is not intuitive.