Guideline 4.7 is Apple's way of controlling mini-app ecosystems and game streaming inside apps. If your app acts as a platform for distributing HTML5 games or interactive content that bypasses the App Store review process, you're going to hit this wall. Here's how to navigate it.
What Apple said
“Your app appears to distribute HTML5 games to users in a way that functions as an app marketplace or mini-program platform. Apps that distribute other executable code or games not reviewed by Apple are not permitted.”
Apple requires that all interactive content and games available to users go through App Store review. Apps that let users access a catalog of HTML5 games — especially if those games update or change after the app is approved — are essentially bypassing the review process. Apple views this as an unauthorized app marketplace.
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.