Yes you right, kotlin multiplatform can do that, in business logic side, in view side or UI side i think not, because IOS still use swift to write the UI.
You'll definitely still be writing the UI in Swift! But you can write the UI in Swift, as well as the functions that Kotlin doesn't do! Moving in the other direction, programming for JVM, Android, etc, it quite the endeavor, though, and doesn't seem to be supported.
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