WTH is it so difficult to get the energy dashboard to show COSTS not just kWh used?

In the modern era, an ever-increasing number of people use a time-of-day tariff for their energy, one where energy at night for example is cheaper than that at peak times.

It would therefore be great if we could have the energy dashboard not just just show the energy used, but also the cost of that energy, based on the time-of-usage of that energy and a sensor (such as the one already provided by the Octopus Energy integration) to show the cost of energy by time.

So useful, yet so awkward currently. WTH we don’t have such a useful feature out-of-the-box confounds me.

Just make a template entity where the value changes based on the time of day. Use that as your cost sensor.