One problem with this approach is that a lot of times monetization in tiktok or instagram happens through third party sponsors/product placements, rather than directly between the platform and the content creator.

Not sure amount of views or likes really matter. If you are interested in profiting from your kid, you will actively promote their content. It's rare to reach a lot of popularity without active promotion. I would draw the line there. Actively promote your kid Social network content should be just banned.