Apple allows PC OS emulator on iPhone, iPad: What are these, how these work
After allowing retro gaming console emulators on iPhones, Apple has now approved UTM SE PC emulator app for distribution on iPhones through the App Store. The operating system emulator app, the first of its kind on iPhones and iPads, allows users to emulate older versions of Windows and MacOS on iPhones to run classic software and retro PC games.
Earlier this year, Apple had updated its App Store guidelines to allow retro game console emulators, mini games, and HTML5 mini apps on iPhones (under guideline 4.7).