A family of Microsoft products that enable users to capture, organize, and reuse notes electronically.
Dear Kieranpjo,
Good day! Thank you for posting to Microsoft Community. We are happy to help you.
As per your description, please let us cooperate and please don’t worry, we can work together to narrow down and resolve the situation.
you may try to use a Window computer and try the OneNote 2016 app. Using OneNote 2016 to transfer notebooks is the quickest way to transfer notebooks.
You can install OneNote 2016 for Windows application from this article to install the OneNote 2016 for Windows application.
Open the notebooks from OneDrive for business account in OneNote 2016 for Windows application. Click File>Export>Notebook>OneNote package>choose a local drive path (e.g., Desktop).
Also, you can open the Open Notebook in the un-packaged folder with OneNote desktop application and click File>Share>choose another OneDrive>Move.
You may refer to steps in this similar thread: Transfer OneNote notes to new Office 365 Subscription
Your understanding and patience will be highly appreciated. I hope that you are keeping safe and well!
Sincerely,
Waqas Muhammad