I know loads of people that have had 4 shots (sinovac and AZ, sinopharm X 2) as part of 2 unconnected and not computerised Vaccination schemes. So I would imagine that the actual number of people Vaccinated is far lower than reported.
As far as the Cambodian and Laos bar workers, seems from FB posts that the majority of those that I know bin Pattaya seem to have been done, and got the western vaccines