Dear Elliott Collins,
Good day! Thank you for posting to Microsoft Community. We are happy to help you.
As per your description, it seems that you are trying to share OneNote between work account and personal account.
If the understanding above is right, to help you better we'd like to confirm how is the work email accessible via onedrive.live.com which is the link for personal account, any screenshots would be appreciated.
Generally, we can share the notebook with external account, work account, or personal account based on the sharing settings and via the steps shared in below official article.
For your reference: Video: Share your notes with others - Microsoft Support
Use OneNote for the web to share notes with other people - Microsoft Support
Share OneDrive files and folders - Microsoft Support
We'd recommend you open the OneNote notebook in browser's InPrivate mode to check the outcome. If the issue still persists, please take a screenshot and share with us. Please also share some screenshots of "such that it shows up on SharePoint?" for a better understanding.
Appreciate your understanding that sometimes the initial reply may not resolve the situation very soon. However, we can work together to narrow down and resolve the situation. Please kindly post back and provide the more information, then we can focus on your specific scenario and provide specific suggestions.
If the understanding above is not consistent with yours, please feel free to post back and point that.
Your understanding and patience will be highly appreciated. We hope that you are keeping safe and well!
Thanks for your cooperation.
Sincerely,
Rhoda | Microsoft Community Moderator