Show child's curve in parent

I created two childs and one parent. The curve in the parent matches te sum of the two childs. All good here.
Now I wanted to see what each system does separately in this same curve.

How can I show the both childs as 2 extra curves into the parent plot?

Thanks for any help

This feature isn’t supported.

To display data on the graph it needs to be recorded. The parent only receives the sum of children systems.

If it were to be implemented, the child data will need to be recorded to one of the parent’s extended parameter.