Hi Francisco,
Thanks for contacting Syncfusion support.
Chart Legend items are dependent to chart series data source. The Legend items are displayed in chart in the order of data points added. Currently there is no properties exist to reorder legend items or to display items based on YBindingPath. Still we can reorder the legend items, only by reordering the chart data point but it will also change the series segment order.
Please let us know for any concerns.
Regards,
Gobi M