Yes, the college does not offer a CA course. However, because more than half of the students of Narsee Monjee College of Commerce and Economics go on to pursue CA in the later stage of their lives, it is claimed as the CA factory nonetheless.
One of my cousins is a recent alumnus of the institute, and he says that the title acclaimed to NM college is quite inaccurate. It is because there are several other top colleges that produce students who go on to pursue CA in their upcoming years, without having to call themselves a part of the CA factory. For instance, HR, SRCC, and numerous other institutes are to name a few handfuls.
Now, whether it is accurate to call NM College a CA factory or not is a completely subjective view. But it is called CA factory as a considerable number of students pursue CA after the completion of their degree from this college.