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Dear Ian Main,
Good day!!
I understand your concern and to my knowledge & search, I would like to convey that it’s not possible to allocate the more storage from the pooled storage to the SharePoint Online tenant storage and when I check the admin center settings in the educational account, there is no setting to allocate the more storage from the pooled storage to SharePoint Online tenant.
In this situation, I would like to recommend you connect with the related development team where they can provide more details on managing the pooled storage.
So, I request you to create a new service request from the Microsoft 365 admin center, where they will connect with you via preferred contact method and help you further.
Reference: Get support - Microsoft 365 admin | Microsoft Learn
Appreciate your patience and understanding. Have a great day!!
Best Regards,
Sophia