Hi @frob-0826 ,
According to my research, we could not realize your design in O365.
On the one hand, you can get simple lists through OneDrive and Microsoft List, but if you don't use SharePoint Online, you can't get workflows.
On the other hand, because your SharePoint Online is restricted to internal users, the relative OneDrive can only be used by internal users (Sharing settings for OneDrive can't be more permissive than your settings for SharePoint), so you can't get the lists through OneDrive and Microsoft List.
Related References:
- Microsoft Lists: A Deep Dive on the “New” Tool for Making Lists in Microsoft 365
- Manage sharing settings
Thanks,
Echo Du
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