Dear ROBERT J. SLOTVIG,
Greetings! Thank you for posting in Microsoft Community.
I'd like to help you, please let us cooperate, we can work together to narrow down and resolve the situation.
Per your description, it seems that you want to sync Microsoft Forms linked Excel workbook to SharePoint, you need to be able to have it on SharePoint.
May I know if my understanding of the scenario is consistent with yours?
If yes, you may try to directly create a Microsoft Form in a SharePoint library, click New > choose Forms for Excel, it will open a blank form where you can create questions.
And there is a linked Excel workbook stored in the library, when you open it, you can check forms responses from the Form tab, as shown below, it will automatically get forms responses.
By the way, you can find your forms from Forms home page Microsoft Forms | Microsoft 365
If my understanding of the scenario is not consistent with yours, feel free to point it out, I will continue helping you.
Thanks for your time and cooperation! Hope you have a nice day, stay safe and healthy always.
Sincerely,
Tina | Microsoft Community Moderator