"there were 4,656 COVID-19 fatalities nationwide between 25 July - 19 August. 63.8% of deaths had not been vaccinated."
No this is the statistic I was referring to (Or rather, the inverse of it, so 36.2% of deaths were people who were vaccinated).
Although all of the statistics in this article are very misleading in general, but in a semi-obvious way which I assume was intentional, so that they could criticize Sinovac without directly criticizing it (As legal action has been taken against some people who have criticized Sinovac).
Since 36.2% of the deaths were in vaccinated people. Which given that only around 1/3 of Thailand is vaccinated, points towards the vaccinations doing pretty much nothing against the delta. And most people who have been vaccinated, have been vaccinated with Sinovac.
However, they've then gone to lengths to try and make the amount of people who died after 2x AZ vaccinations look like only a very small amount of the total deaths (Although without knowing the percentage of the population who have 2x shots of AZ, it's a bit like saying 0% of people with Moderna died. Since of course it's 0% because no one (or very very few) actually have Moderna so far).