Best way to use Paywall within NavController (Jetpack Compose)

Let’s say I have a NavController with 5 pages, and 3 of them should be behind paywall - whenever the user navigates to those routes, i would like to show the paywall if needed (thankfully this is handled within the paywall composable itself) - but i don't want the composable behind the paywall to render/run at all.

The documentation shows this:
 

@OptIn(ExperimentalPreviewRevenueCatUIPurchasesAPI::class)
@Composable
private fun NavGraph(navController: NavHostController) {
    NavHost(
        navController = navController,
        startDestination = Screen.Main.route,
    ) {
        composable(route = Screen.Main.route) {
            MainScreen()

            PaywallDialog(
                PaywallDialogOptions.Builder()
                    .setShouldDisplayBlock { !it.entitlements.active.isEmpty() }
                    .setListener(
                        object : PaywallListener {
                            override fun onPurchaseCompleted(customerInfo: CustomerInfo, storeTransaction: StoreTransaction) {}
                            override fun onRestoreCompleted(customerInfo: CustomerInfo) {}
                        }
                    )
                    .build()
            )
        }
    }

But this technically runs all the code that is inside MainScreen()

What is the best practice to avoid that?
I tried retrieving if the customerinfo has the active subscription for that page, and if yes, i allow mainscreen() to be rendered, but I don’t know if thats the most optimal way.