Why is that the news? Using NHANES data for standardized numbers, in 1990 it was roughly 44% of Americans. That’s lower than 1980 (~47%), 1970 (~48%), and 1960 (~46%). Did you think Americans were unusually thin in 1990 or something?
The 1990s are actually when the numbers jump. By 2000, it’s 65%. 2010, it’s 68%. And in 2020 to the most recent yearly data (2023), its 74%.
To be fair, I don’t think many of us would recognize someone who is a BMI of 26 as “overweight.” It technically is, but you’ve probably seen people regularly that are “technically” overweight but would never realize it. You yourself might be (and, statistically, are likely to be) overweight according to BMI and not realize it.
The really staggering thing is obesity. From 1960 until about 1992, it was between 15-20%. By 2000 it was 30%. These days it’s getting close to 45%.