Single NavHost with BottomBar and Sign Page in Android Jetpack compose

Question

How to handle Single NavHost in Single Activity approach in Multi Module structure in Android Jetpack compose.

Did not see any example with below scenario to handle single NavHost in Single Activity. Navigation should start from splash screen.

Custom Splash Screen -> Sign in Screen -> Home Screen with BottomBar

 NavHost(navController, startDestination = "Splash")
    {
        composable(route = "Splash") {
            Splash()
        }
        composable(route = "Sign In") {
            SignIn()
        }
        composable(route = "Home") {
            Home()
        }
}

BottomBar has 3 options to navigate between each bottom bar items.

Where to add BottomBar in above scenario?

Updated as per comments

Scaffold(
    bottomBar = { BottomBar(navController = navController) }) {
    // sub graph for Home?

}