Deprecation warning "expect and corresponding actual are declared in the same module, which will be prohibited in Kotlin 2.0"

I'm getting this deprecation warning in vs code:

> Property 'secondElement': expect and corresponding actual are declared in the same module, which will be prohibited in Kotlin 2.0. See https://youtrack.jetbrains.com/issue/KT-55177

Not yet researched how to do it properly in kotlin 1 and 2, but opening this issue because I think this template should not produce warnings by default.

Start by locating the expect/actual declaration for `secondElement` in the template and reproduce the warning in VS Code. Research the Kotlin 1 and Kotlin 2 requirements described by KT-55177; done means the template no longer produces this warning by default while retaining the intended multiplatform behavior.

Written by the indexing model from the issue text.