Is the only reason you think that isn't "child labor" because no one is directly paying them for their work or that the work is "good for them"? Plenty of kids would argue picking fruit was more valuable than algebra homework.
Having kids working a little isn't necessarily bad, it is the conditions under which they work which is important but more subtle issue. In regions of extreme poverty it isn't even the conditions that are often the root problem but the foreign exploiters of the extreme poverty failing to pay a fair wage for human work.
>"I feel sad. I want to be, like, a medical doctor," Munira said. "But my family doesn't have money for school."
It's much easier for corporate overlords to focus on cheap issues like child labor and then make the appearances of trying to do something about it... when the causes of child labor are more like "you pay my family so little I can't afford to go to school and nobody else either so the nearest school is an hour away". If you give people the opportunity to barely stay alive they'll fix these things themselves.