Google Maps Compose - Add multiple markers, one at a time on Click in Kotlin/Android

Using "maps compose" I need to add a marker on the location that I click on. I have managed to add marker where I click but unfortunately the old marker disappears. I want to click on Sydney ( have a marker there ) then Melbourne ( add a new marker). Its not a cluster kind of requirement. I just want multiple markers added on the map. my code is

 Box(Modifier.fillMaxSize()) {
        GoogleMap(cameraPositionState = cameraPositionState,properties = mapProperties, uiSettings = mapUiSettings,
                        onMapClick = {viewModel.onMapClick(it)}
                )
        {
            SydAU= viewModel.clickLoc.collectAsState().value
            Marker(
                state = MarkerState(position = SydAU),
                title = "Marker in Sydney"
            )
        }

    }

Thanks