A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data
Dear Jack,
Thanks for writing back and sharing the requested information with us.
As per the further updates, the behavior you are encountering is not an expected because you are able to work on the same Excel workbooks using the Excel application on the laptop, but the same workbooks are not able to edit in the Excel app on the mobile device.
Since the all Excel workbooks that you are able to work on the Excel app on the laptop should be stored in your cloud locations such as OneDrive or SharePoint Online, I suggest you try to access the same Excel workbook on the browser of your mobile device and see whether you are able to edit.
If yes but the problem is with the Excel app only on the mobile device, if possible please uninstall the Excel app on your Android device and re-install it to check the outcome.
If still the same problem, we apologize and request you to please connect with the IT team of your university and request them to raise a new service request from the Microsoft 365 admin center, where the related development team can collect the related logs and perform the further investigation to find out the cause of the issue.
Reference: Get support - Microsoft 365 admin | Microsoft Learn
Note: To create a support ticket, you need to have admin privileges and if you aren’t admin of your Office 365 organization, please contact the admin of creating a new ticket.
Appreciate your patience and understanding with us. Have a great day!!
Best Regards,
Sophia