In ArcGIS Pro 2.5 charting symbology was introduced. It appears there is an error and data with small values do not show up in the pie chart. See the attached example. Below a certain threshold, the data disappears. I get at some small value, the slice of the pie chart would be difficult to see. However, why not make it difficult to see instead of misleading the viewer by having the data disappear altogether? The same data works in excel exactly as expected