Count elements visible in dashboard

[Mariano_Sanz_Gi]

Good morning to all members of the AppSheet community.
I have a dashboard that has several hierarchical panels. Projects > To-do list > Tasks > Hours.
I want to add to the panel title the number of elements listed and the total number of elements in the table. In this way it is easy to know if I am inside an element and, therefore I see the dependent items or I am outside and I see the whole table.

I’m trying things out but I don’t see how to get that data. Has anyone done this before?

Thank you very much.