How to lock orientation to portrait in SwiftUI

// AppDelegate.swift
import SwiftUI
 
class AppDelegate: NSObject, UIApplicationDelegate {
    static var orientationLock = UIInterfaceOrientationMask.portrait
 
    func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
        return AppDelegate.orientationLock
    }
}

// MainApp.swift
import SwiftUI
 
@main
struct MainApp: App {
    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
 
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}

// ContentView.swift
import SwiftUI
 
struct ContentView: View {
    var body: some View {
        Text("Hi, I'm locked 🔒")
    }
}