Official MFA spokesman gave a radio interview this morning which will be on YouTube MFA channel later. According to Twitter replies they are saying the following " I asked my colleague at the Consular Affairs Dep & was informed that vaccines allocated for expatvac registrants include Sinovac, AstraZeneca & Pfizer. The vaccine you receive will be determined by the vaccination site, based on allocation & availability at the time."
So there it is Sinovac and AZ most likely with Pfizer for the chosen few...