Error Missing argument for parameter ‘placemark’ in call.

I followed a tutorial and now I’m trying to do a little bit on my own and ran into this error. The goal is to present the Markers and the Placemarkers on the Map. So if there’s a way to do it cleaner or more efficiently, or someone who can help me fix the error I’m having, I would be really thankful.

struct ContentView: View {
    @Environment(.modelContext) private var modelContext
    
    var body: some View {
        TabView {
            MapView()
                .tabItem {
                    Label("Map", systemImage: "map")
                }
        }
    }
}

#Preview {
    ContentView()
        .modelContainer(Placemark.preview)
}

MapView:

struct MapView: View {
    @State var position: MapCameraPosition = .userLocation(fallback: .automatic)
    @State private var selectedMarker: Markers?
    @State private var isManualMarker = false
    
    @Environment(.modelContext) var modelContext
    @Query() private var searchPlacemarks: [Markers]
    
    @State var placemark: Placemark
    
    private var listPlacemarks: [Markers] {
        searchPlacemarks + placemark.placemarks
    }
    
    var body: some View {
        VStack{
            MapReader { proxy in
                Map(position: $position) {
                    ForEach (listPlacemarks) { pin in
                        Marker("", coordinate: pin.coordinate)
                    }
                    UserAnnotation()
                }
                .onTapGesture { position in
                    if isManualMarker {
                        if let coordinate = proxy.convert(position, from: .local) {
                            let markers = Markers(
                                name: "",
                                address: "",
                                latitude: coordinate.latitude,
                                longitude: coordinate.longitude
                            )
                            modelContext.insert(markers.self)
                            selectedMarker = markers
                        }
                    }
                }
                .onAppear {
                    CLLocationManager().requestWhenInUseAuthorization()
                }
            }
        }
        .safeAreaInset(edge: .bottom) {
            HStack {
                Toggle(isOn: $isManualMarker) {
                    Label("Marker placement is: (isManualMarker ? "ON" : "OFF")", systemImage: isManualMarker ? "mappin.circle" : "mappin.slash.circle")
                }
                .fontWeight(.bold)
                .toggleStyle(.button)
                .background(.ultraThinMaterial)
                .onChange(of: isManualMarker) {
                }
                .cornerRadius(4)
            }
            .padding()
        }
    }