They do? There aren’t any. You confused them with multi-project. As far as I can tell none of those examples have a multi-platform setup. This should not matter however.
You can follow those examples on how to setup the project structure. I guess you have to replace the plugin from kotlin("jvm") to kotlin("common"). I don’t know what exactly it is. You might need to experiment with the name a bit until you get it right. Then in the dependencies I guess you do exactly the same as you would using Groovy except with a slightly different syntax expectedBy(project(":-common"))