The article you cite says that the government report found that "The report found that 4.54% of all New York apartments are vacant as of 2021." That’s a pretty low vacancy rate for a city! The government survey was also conducted when NYC still felt some of the effects of people avoiding urban areas from the pandemic, while, the newer survey is from 2022, when those effects have mostly gone away. A global real estate company would also want to conduct an accurate survey, because then they can use the information to invest better.
No matter what the source being used, NYC still has a low, low vacancy rate, which landlords love because low supply means they can charge much more.