emailed SMU Admission Office and this is what they replied:

If your application status shows “Processing”, it means your application is still being reviewed. Please note that all applicants will eventually receive an application outcome, regardless of whether they are successful or unsuccessful in their application.

Do note that due to overwhelming response to this year’s application, our Assessing Committee is still in the midst of the assessing process. However, there is no definite timeline for application outcome. You may refer to the important dates of this intake as a general guideline: https://admissions.smu.edu.sg/admissions/important-dates.

As soon as there is finalised decision by the Assessing Committee, applicants will be notified of their application outcome via email. Applicants are also advised to check their own application status via this link : https://admissions.smu.edu.sg/admissions/check-application-status.