This is pretty old now, but j2objc + KMP was one of the first things I did with KMP. Published anyway. We were working on a whole ecosystem for J2objc at the time, so it kind of made sense. Kotlin/Native is like Kotlin/JVM without the JRE, and J2objc is basically the JRE on iOS, so it seemed like they’d be a good match. However, the interfaces don’t align quite right, so you wind up needing to write glue code.
https://medium.com/@kpgalligan/sqlite-sqldelight-%EF%B8%8F-kotlin-multiplatform-f24fe7cba338