Can I compile kotlin-multiplatform-native on widnows into a .framework file? I opened this project https://github.com/JetBrains/kotlin-mpp-example in my Windows IntellijIdea and tried to do so, but there is no

compileDebugIos_x64KotlinNative

task that is referenced in this gradle script https://github.com/JetBrains/kotlin-mpp-example/blob/master/greeting/ios/build.gradle. I'm not familiar with how ios build system works, do I need to open it from Xcode on Mac?

You need to build on a Mac. Even if you get cross compilation working the signing has to happen on a Mac.

Will Mac OS VM on Virtualbox work?

Unless you’re running that on MacOS it would be violating the license agreement of MacOS.