Dear respected GusWhotis,
Good morning! Thank you for publishing in Microsoft Community.
We went through your post carefully and appreciate your sharing which will help other Access users when some fields are not showing in imported database. From your concern, it seems like some default fields like Created or Created By is still not showing in Access. Please correct me if I made any misunderstanding of this.
In this situation, I tried to deploy some tests first to confirm the behavior on my side where I displayed some default columns in the SharePoint list like ID, Modified, Created, and Created By, but it seems like none of them has been imported to the database.

Hence, we may sorry to convey there may currently have some feature limitations about import SharePoint list default columns into Access database, and we will submit this via our channel and it is also suggested for end users to submit your feedback and valuable ideas directly to the product development team via How do I give feedback on Microsoft 365? - Microsoft Support

I appreciate your time and effort on checking these above and thank you for your time and cooperation. I hope that you are keeping safe and well!
Sincerely,
Mia | Microsoft Community Moderator