If i get it righr, you can’t really get the variable name, it is not how the Shuffleboard api works and java / cpp entierly, all you can get is as far as the key you provided, which is already displayed on top of each widget
the other option you may mean is that the key will be displayed on top of the green / red box for booleans or such
Just mostly an accessibility and preference thing, especially when e.g. someone has poorer eyesight it is easier to have bigger text that spans across the entire widget.
I know not too many teams have this issue so it would be nice to have but its fine if it is thrown to the backburner.