Hi Shadman,
Thank you for contacting Syncfusion support.
We have checked your reported requirement and we would like to let you know that it can be achievable in our spreadsheet by using the openFromJson and saveAsJson method. We have already demonstrated this in our knowledge base section itself. In this we have saved the spreadsheet data as jsonobject in database and open the saved jsonobject in spreadsheet. Please find the link below.
Could you please check the above details and get back to us, if you need any further assistance on this.
Regards,
Sangeetha M