If your app is in the Kids category, Apple and COPPA hold it to a much stricter standard. A single analytics SDK or an outbound link can kill your approval. This guide explains the rules and how to clean up your app.
What Apple said
“Your app is categorized as a Kids app but we found it collects user data and/or displays third-party advertisements. Apps in the Kids category must not include third-party analytics or advertising and may not transmit data about children without verifiable parental consent.”
The Kids category on the App Store carries COPPA compliance obligations. Apple prohibits data collection, behavioral advertising, and links to external websites in kids apps unless parental consent gates are in place. Even 'anonymous' analytics SDKs like Firebase or Mixpanel can trigger this rejection because they technically transmit device data.
While you're at it — Apple also requires these pages for every app.
Fix this rejection, then make sure you're covered on the compliance side too. Apple requires every app to link to a hosted Privacy Policy, Terms of Service, Support page, and Data Deletion page. No link means another rejection — just for a different reason.