Core Data in the new App Structure

What is the best way to incorporate Core Data into the new App Structure?

Code Block 
import SwiftUI
import CoreData
@main
struct SessionsApp: App {
    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
    var body: some Scene {
        WindowGroup {
            let context = appDelegate.persistentContainer.viewContext
            ContentView()
                .environment(\.managedObjectContext, context)
        }
    }
}

Then In AppDelegate the code is like this

Code Block 
import UIKit
import CoreData
class AppDelegate: NSObject, UIApplicationDelegate {
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
        print("UIApplication, didFinishLaunchingWithOptions")
        return true
    }
    // MARK: - Core Data stack
    lazy var persistentContainer: NSPersistentContainer = {
        let container = NSPersistentContainer(name: "Sessions")
        container.loadPersistentStores(completionHandler: { (storeDescription, error) in
            if let error = error as NSError? {
                fatalError("Unresolved error \(error), \(error.userInfo)")
            }
        })
        return container
    }()
    // MARK: - Core Data Saving support
    func saveContext () {
        let context = persistentContainer.viewContext
        if context.hasChanges {
            do {
                try context.save()
            } catch {
                let nserror = error as NSError
                fatalError("Unresolved error \(nserror), \(nserror.userInfo)")
            }
        }
    }
}

Finally

Code Block 
import SwiftUI
import CoreData
struct ContentView: View {
    @Environment(\.managedObjectContext) private var context
    @FetchRequest(entity: Session.entity(), sortDescriptors: []) private var sessions: FetchedResults<Session>
    @State private var showingAddScreen:Bool = false
    var body: some View {
        NavigationView {
            List {
                ForEach(sessions, id:\.id) {session in
                    Text("\(session.name ?? "unknown")")
                }
            }
            .navigationTitle("Sessions")
            .navigationBarItems(trailing: Button("Add", action: {
                self.showingAddScreen.toggle()
            }))
        }
        .sheet(isPresented: $showingAddScreen, onDismiss: {self.showingAddScreen.toggle()}) {
            SessionFormView()
        }
    }
}
struct ContentView_Previews: PreviewProvider {
    static let coreDataHelper = CoreDataHelper()
    static let context = coreDataHelper.persistentContainer.viewContext
    static var previews: some View {
        ContentView().environment(\.managedObjectContext, context)
    }
}

Advice ?