Scaffold(topBar = ..., bottomBar = ..., ...) {
  when (currentScreen) {
    ...
  }
}

val content @Composable () -> Unit = {
  when (currentScreen) {
    ...
  }
}

if (currentScreen.isHomeDestination) {
  Scaffold(...) { content() }
else 
  content()

@Composable
fun SearchMovie(...) {
  HomeScaffold {
    ...
  }
}

currentScreen

Scaffold(
    topBar = { AppBar(currentScreen) }.takeIf(currentScreen.hasTopBar)
) { /*body*/ }

Problem is that some screen have fab, some have search bar in topBar, which has actions, etc.

interface Screen {
    val topBar: @Composable (() -> Unit)?
    val bottomBar: @Composable (() -> Unit)?
    val fab: @Composable (() -> Unit)?
    val body: @Composable (InnerPadding) -> Unit
}

Scaffold(
    topBar = currentScreen.topBar,
    bottomBar = currentScreen.bottomBar,
    floatingActionButton = currentScreen.fab
) {
    currentScreen.body(it)
}