https://support.tracetogether.gov.sg/hc/en-sg/articles/4404525098137-My-Vaccination-status-is-not-updated-in-the-TraceTogether-App-What-should-I-do-

If you’ve just taken your vaccination through the Special Access Route (e.g. Sinovac)
We are working with the various teams to include this data to display on the TraceTogether App by late August 2021.

If you need to access your vaccination status urgently, you can consider checking HealthHub (requires Singpass login), or use the hard/digital copy of the vaccination certificate.