Extend device or custom device for info & graph with multiple data rows

Hey there, I love that for most devices I can just click on info and see the most relevant information straight away.

For instance, my homematic devices show the current temperature combinded with the set temperature in a graph (and even colors the area when in heating mode). But I’d like to add the valve status to that graph. I know that I can create graph cards for dashboards, but I’d like to create kind of my own custom devices and define the relevant information or extend the existing one.

Is this somehow possible?

kind regards!