MMS documentation refers to Dashboard features that are from previous MMS cloud releases and no longer available. text should at least be clarified for whether nor not Dashboards are still available in On Premise instances of MMS

"click the Dashboard tab and select the dashboard"

"When adding a new dashboard, you can select the "ADD CHART" button to create a dashboard that includes a custom selection of charts"

etc

https://docs.mms.mongodb.com/core/dashboards/