Apple aims to protect kids’ privacy. App makers complain about it.

That'd be less than useless. Not only would it junk up the UI in the App Store, it doesn't provide any useful information to the user. What does it mean that the Yahoo Finance app has the Flurry and New Relic SDKs in their app? And what is the user supposed to do with that information?

These kinds of "transparency" rules is something I imagine a legislator would come up with after fierce lobbying by the ad-tech industry. Fortunately Apple is not a government and they can and should ban these SDKs. Developers will always complain and these days they'll claim it's anti-competitive, but that shouldn't stop them.