Hi @Shubham Sharma , as I can't sure your data vol, so I can't fully reproduce your question,
I recommend try use the session header workbook-session-id: {session-id}
Enter non-persistent session mode by API:
POST https://graph.microsoft.com/v1.0/me/drive/items/{item-id}/workbook/createSession
to see if it can improve performance. Hope it can help you, best regards.
Documentation for your reference:
https://learn.microsoft.com/en-us/graph/api/resources/excel?view=graph-rest-1.0
https://learn.microsoft.com/en-us/graph/api/workbook-createsession?view=graph-rest-1.0&tabs=http
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.