Can I use the form's own unique Submission ID as the Access Code Column

Can I use the form's own unique Submission ID as the Access Code Column for this "Spreadsheet to Form" widget?

Unfortunately, it's not possible because the unique ID won't be loaded unless the form is submitted. Another issue is that spreadsheet to form widget's unique ID is already predefined, this means that you need to upload the excel file that contains the updated IDs which you won't be able to apply if you are filling it dynamically.

Let us know if you have any questions or if you need further assistance.