what is the correct way to add mapmakers in Xcode.

I have searched this site and StackOVerflow forums and Im unable to find an answer that helps me figure out how to add MapMarkers to my MapView.

I am adding onto the SwiftUI Landmarks Tutorial,

I want to be able to see the marker when i click on the landmark row name and the map shows up for that location and i want to have a map view that shows MapMarkers of all locations in that area.

This is my MapView

import SwiftUI
import MapKit

struct MapView: View {
    var coordinate: CLLocationCoordinate2D
    var landmark: Landmark
    
    @State private var region = MKCoordinateRegion()
    
    
    var body: some View {
        Map(coordinateRegion: $region)
            .onAppear {
                setRegion(coordinate)
            MapMarkerTool(coordinate: landmark.locationCoordinate)
                
            }//onappear
        
    }//body.view
    

    private func setRegion(_ coordinate: CLLocationCoordinate2D) {
        region = MKCoordinateRegion(
            center: coordinate,
            span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01))
    }//private func
}//struct mapview


struct MapView_Previews: PreviewProvider {
    static var previews: some View {
        MapView(coordinate:CLLocationCoordinate2D(latitude: 36.4786, longitude: -117.0745), landmark: landmark)
    }//view
}//preview

This is my MapMarkerTool

import SwiftUI
import MapKit

struct MapMarkerTool: Identifiable {

        let id: UUID
        let location: CLLocationCoordinate2D
        init(id: UUID = UUID(), lat: Double, long: Double) {
            self.id = id
            self.location = CLLocationCoordinate2D(
                )
            
        }
    
    }

    struct PinAnnotationMapView: View {
        let place: MapMarkerTool
        @State var region: MKCoordinateRegion

        var body: some View {
            Map(coordinateRegion: $region,
                annotationItems: [place])
            { place in
                MapMarker(coordinate: place.location,
                       tint: Color.purple)
            }
        
        }
    }
//Prieview was deleted because i wasn't sure if it was needed or not and it kept showing up as an error.