Correct the energy dashboard is not configurable except for the sensors you supply to it. It is a one size fits all solution that may not actually suit everyone (particularly if you have a battery that can charge from the grid). You are of course free to make your own energy dashboard.
All of the cards in the energy dashboard are available for use in your own dashboards, but they are just copies of the data in the Energy Dashboard, so if you don’t have that set up they will not work.
As I said you are free to make your own. In addition to the built in cards, here are some 3rd party cards that may assist with doing this:
https://community.home-assistant.io/t/anyone-using-the-sankey-chart-card/423125
https://community.home-assistant.io/t/lovelace-bar-card/87503
https://community.home-assistant.io/t/lovelace-bar-card/87503
https://community.home-assistant.io/t/power-flow-card-plus/552326