Hi Khalid,
Thank you for contacting Syncfusion support
#Regarding IsVisible property of AccordionItem in SfAccordion is not working
We would like to inform you that as per implementation of SfAccordion, we cannot hide AccordionItem using IsVisible property. But you can achieved your requirement by adding and removing the AccordionItems collection at runtime by using button clicked event. We have already prepared the KB documentation “how to show or hide the item in SfAccordion”. Please refer the sample in the following KB link.
We hope this helps. Please let us know if you need any further assistance.
Regards,
SaiGanesh Sakthivel