We tried setting using Additional data but looks like ACS treats values
in Addtional data field as text, so can't evaluate GetDate() function.
Additionally, tried luck by setting the value through document
controller (the way it can be done in AC classic), but even that is not
working. function setSubmissionDate(){var date = new
Date();console.log(date);document.controller.setValue('/context/profile/OptoutDate',
date);}