A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
@Kompal Sithta you try the below uri, structure, it works for me.
-> to get all rows from xlsx {Sheet} is excel workbook sheet naem and {Table name} is formated table in Sheet
https://graph.microsoft.com/v1.0/sites/{Site ID & Group ID}/lists/{Document library List GUID}/items/{Sharepoint Item ID(number)}/driveitem/workbook/worksheets/{Sheet}/tables/{Table Name}/rows
-> to get table header from xlsx {Sheet} is excel workbook sheet naem and {Table name} is formated table in Sheet
https://graph.microsoft.com/v1.0/sites/{Site ID & Group ID}/lists/{Document library List GUID}/items/{Sharepoint Item ID(number)}/driveitem/workbook/worksheets/{Sheet}/tables/{Table Name}/columns?select=name