In a MPP setting, did you manage to build an iOS app with AppCode, or are you using Xcode? How do you work on the kotlin/native code (to have autocompletion, imports iOS kotlin classes, etc) ?

You can follow the steps from this docs > https://github.com/JetBrains/kotlin-native/blob/master/MULTIPLATFORM.md#4-ios-application . Basically you'll create a cocoa touch framework inside your ios project. And then add the kotlin native module to that framework. So you can open the ios project (that contain the framework with your K/N code) inside AppCode. cmiiw.