Currently, there is no functionality to manually define bins for charts in the chart widget of Experience Builder. That is to say that one cannot specify the range of values for a field that each slice in a pie widget represents, for instance.
If I can manually define symbology class ranges in pro (i.e. X<5 is green, 5<X<10 is yellow, etc.), I would like to be able to depict this in a chart as well once I publish the feature layer for use in an ExpBuilder. This is not possible as it stands, as there is no capability to manually define chart bin ranges as with symbol classes.
Sure, I could make another text field and define an expression to populate the field with categories corresponding to text values, but it'd be a lot easier and make a lot more sense to just do this in the widget.
So, my idea: allow manual definition of bin ranges for charts in experience builder.