Unfortunately, Revit API access is not currently available for this feature.
Feature Request: CF-66
References:
https://forums.autodesk.com/t5/revit-api-forum/expose-design-options-settings/td-p/6450298
https://forums.autodesk.com/t5/revit-api-forum/delete-designoptionset/td-p/5831338
https://forums.autodesk.com/t5/revit-api-forum/how-to-quot-accept-primary-quot-on-design-options-via-api/td-p/6043340