They only care about Java -> Kotlin integration. Not the other way around. It has been like this for a long time. Looks like an extractive relationship to me to be frank.
You have to explicitly annotate that a Kotlin data class is a Java record due to the limitations Java has on records compared to data classes [1]. This is similar to adding nullable/not-null annotations in Java that are mapped to Kotlin's nullable/non-nullable types.
Where there is a clean 1-1 mapping and you are targeting the appropriate version of Java, the Kotlin compiler will emit the appropriate Java bytecode.
[1] https://kotlinlang.org/docs/jvm-records.html#declare-records...