This tripped me up as well.
The What's New section titled "Preview of Gradle composite builds support in Kotlin Multiplatform" has a notice that "the feature is available since IntelliJ IDEA 2023.1 EAP 3 only", leading me to think I need to use 2023.1 EAP 3 with 1.8.20-Beta to make use of those changes.
Since that's impossible to do, that section probably needs to be changed or removed.
m
Margarita Bobova
02/09/2023, 9:24 AM
Sorry for the inconvenience😔 You can use Latest IDEA 2023.1 + 1.8.20-Beta KGP, it works as expected