Thanks for contacting Syncfusion Support.
We have analyised your query .At present there is no support to
sort the list data.
We have created a workaround sample, where the points are sorted using ej.DataManger based on yvalues in preRender Event. Please find the code below.
[JS] sender.model.series.points = ej.DataManager(sender.model.series.points, ej.Query().sortBy("y")).executeLocal();
The data from the external datasource is sorted in ascending order
We have attached the sample for your reference WebApplication1
Please let us know if you have any concerns