*cringe* I know he means "regardless of being undocumented..."

Yes - it should not matter. But for EE purposes you need minimum 12 months work experience. So work experience thru Daca should cover it. Unless you need the points and then would need to show pre-Daca work experience in the "work experience" section of the forms - which is the basis for the application.

Regardless, you need to show ALL activity (incl. pre-Daca work exp in the "Personal history" section).