Hi Ajit,
Thanks for contacting Syncfusion support.
We have validated your query while checking your code example we have found that you have used rowTemplate in grid column. Currently, we do not have support for pdf export with rowTemplate, because template has any html element or custom components, so it does not support PDF, so it is not feasible to export the template into PDF file.
Please get back to us if you need further assistance.
Regards,
Balaji Sekar.