Looks like the current stats are focused more on the 69% increase from '19 to '22 in illegally employed children across the US. [1] (https://www.dol.gov/newsroom/releases/whd/whd20220729)

Actually, that report includes a few examples of children killed on the job. Like a 16 year old who died while working in construction, he fell about 160 feet to the ground after trying to jump from a roof to a nearby powered lift. In Nashville. [2] (same link as [1])

It also details the rise in children being employed to do hazardous labor.

Killed in sawmills is a bit of hyperbole, but it's not far off from the truth it seems.