What I must do is when I give the Apply button consult an Api http again the data, according to the fields you select
Our team recommends paying attention to the
reportchange event that is triggered when a report is changed in the component whether by a user or by code. In case the user change the set of selected fields in the Field List and click the “Apply” button, the event will be triggered.
Please see an example we have prepared for you.
We hope it works for your case.
Please let us know in case further questions occur.