Hi,
Am a Commerce Graduate looking to do my Masters in Business Analytics from Singapore.
I have read that, for someone who wishes to pursue this course, they would need a Bachelor's Degree in Statistics, Engineering, or some other Science field.
I am certified in Adobe Digital Analytics, Google Analytics, and Digital Tag Implementation; but seem to lack the credentials of a Science Degree.
Would there be any way around this problem? (Maybe some extra credit course or some additional exam other than GRE/GMAT)

You seem to be mistaken, Please read their FAQ page https://msba.nus.edu.sg/faq/

Seems to be that if you don't have a bachelor's in one of these fields, you'll need at least two years of relevant work experience in the industry.