we have child labor in the US too. It’s not legal
A lot of child labor in the US, is in fact, very legal.
From the age of 10-15, working papers can be issued allowing children to deliver newspaper, hawk products on corners, and do limited farm work.
From 15-17, working papers can be issues allowing children to pretty much do any job, with some limitations on hours, and tooling they can use (ie, no automatic sharp tools, like slicers).
Now, these are for my state. Some states are far more exploitative, such as Georgia, where kids as young as 13 can work a fast food joint.


