It looks like you misunderstand the concept of the Kotlin/Native. It is not JNI analog, but the standalone compiler. It makes possible to write code in Kotlin, with slight differences, and to compile it into the binary files. Also, with Kotlin/Native one can use C libraries very easy, but this is not a transferrable option. To say, even more, to call something written in Kotlin/Native from the Kotlin/JVM one got to use JNI!
So, to conclude everything I said, Kotlin/Native is not a way to use the C library in the Kotlin/JVM app. But, this is the way to write a native app that uses platform-specific C libraries.