I am currently trying to create a seperate composable for the TopAppBar. I am going for something like this:

Material 3 Version

@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun ScaffoldWithTopBar() {
    Scaffold(
        topBar = {
            SmallTopAppBar(
                title = {
                    Text(text = "Top App Bar")
                },
                navigationIcon = {
                    IconButton(onClick = {}) {
                        Icon(Icons.Filled.ArrowBack, "backIcon")
                    }
                },
                colors = TopAppBarDefaults.smallTopAppBarColors(
                    containerColor = MaterialTheme.colorScheme.primary,
                    titleContentColor = Color.White,
                ),
            )
        }, content = {
            Column(
                modifier = Modifier
                    .padding(it)
                    .fillMaxSize()
                    .background(Color(0xff8d6e63)),
                verticalArrangement = Arrangement.Center,
                horizontalAlignment = Alignment.CenterHorizontally
            ) {
                Text(
                    text = "Content of the page",
                    fontSize = 30.sp,
                    color = Color.White
                )
            }
        })
}