Hi
Thank you for your quick response.
According to the following articles:
Delete a user from your organization - Microsoft 365 admin | Microsoft Docs
We noticed the following information:
If your admin removes a user's license but don't delete the account, they can give themselves access to the content in the user's OneDrive. If your admin deletes the user's account, they have 30 days by default to access the former user's OneDrive data, Set the OneDrive retention for deleted users - OneDrive | Microsoft Docs
If your admin don't restore a user account within this time, the deleted users’ OneDrive content is deleted.
By default, the retention period is 30 days. If your admin doesn’t move the files within the retention period after deleting the user, the OneDrive content will be permanently deleted.
So, in this case, to make sure the above information, we suggest you ask your university’s admin to check whether the OneDrive content is deleted by the retention policy or not. If not, you might have a chance to ask your university to help retrieve back your files.
Best regards,
Stacey