Mixed Jetpack Compose / Activity app navigation: from compose to activity and back - android-activity

Question

I am a newbie in Android development so I might be missing something simple here.
I have a compose setup using androidx.navigation:navigation-compose:2.5.3 where I have the routing setup:
sealed class Routes(val route: String) {
object Login : Routes("Login")
object TermsOfService : Routes("TermsOfService")
object Home : Routes("Home")
}
#Composable
fun Routing(startDestination: String) {
val navController = rememberNavController()
NavHost(navController = navController, startDestination = startDestination) {
composable(Routes.Login.route) {
LoginPage(navController = navController, LoginViewModel(AppEnvironment.sdk))
}
composable(Routes.TermsOfService.route) {
TermsOfService(navController = navController)
}
composable(Routes.Home.route) {
Home(navController = navController)
}
}
}
I would setup my MainActivity:
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
App_SenderTheme {
Surface(
modifier = Modifier.fillMaxSize(),
color = MaterialTheme.colors.background
) {
val isLoggedIn = AppEnvironment.encryptedSettingsRepo.isUserLoggedIn.get().toBoolean()
println("Routing based on is_user_logged_in $isLoggedIn")
if (isLoggedIn) {
Routing(startDestination = Routes.Home.route)
} else {
Routing(startDestination = Routes.Login.route)
}
}
}
}
}
}
The Home itself is an Activity setup like:
#Composable
fun Home(navController: NavHostController) {
Box(modifier = Modifier.fillMaxSize()) {
ScaffoldWithTopBarHome(navController)
}
}
#SuppressLint("UnusedMaterialScaffoldPaddingParameter")
#Composable
fun ScaffoldWithTopBarHome(navController: NavHostController) {
Scaffold(
topBar = {
CustomTopAppBar(navController, "Sender", true)
}, content = {
Column(
modifier = Modifier
.fillMaxSize(),
verticalArrangement = Arrangement.Center,
horizontalAlignment = Alignment.CenterHorizontally
) {
val context = LocalContext.current
context.startActivity(Intent(context, HomeActivity::class.java))
}
})
}
class HomeActivity : AppCompatActivity() {
fun logout() {
// HOW TO GO BACK TO COMPOSE IF I DON'T HAVE A COMPOSE NAVIGATION REFERENCE
}
}
I can easily navigate to the HomeActivity from any composable setup since I have the NavHostController, e.g. navController.navigate(Routes.Home.route), but how can I navigate back from the "activityworld` back to compose land.
Thanks.