Hi Carl,
Thanks for contacting Syncfusion Support.
Query#:- Is there any way that I can separate the substrings in the filter menu
We have checked your query and by default the values present in dataSource for the corresponding field will be displayed in dataSource of Excel Filter checkboxList. Even if we customize the values of checkboxList to display it as substrings, it will filter the values bases on dataSource not in checkboxList(filter values present in dataSource alone).
So it is not feasible to achieve your requirement. Please get back to us if you need any further assistance on it.
Regards,
Farveen sulthana T