JPJagadeesan Pichaimuthu Syncfusion Team March 11, 2019 06:54 AM
Thanks for contacting Syncfusion support.
We regret to inform that the SfDataGrid control doesn’t have support to display checkboxes in the group caption rows and it is not possible to achieve this using any sample level workarounds. You can display checkboxes only in the record cells and the column header.
Please let us know if you need any other assistance.