Within Absorb Create, when looking to Upload files - the OneDrive connection should allow and recognize Enterprise Accounts. Most users on Absorb are likely using Absorb Create from their business/company accounts - therefore, their OneDrive files on their Enterprise accounts are likely the ones they would want to upload into Create.
This is particularly true when thinking about those who are transitioning to an LMS who historically used OneDrive for documents, PPTs, etc. to create trainings and guides.