How to do Bluetooth in background in SwiftUI

I'm trying to listen for my Bluetooth device in the background, but nothing seems to be happening. I tried following this guide here and modifying it for SwiftUI.

https://developer.apple.com/library/archive/documentation/NetworkingInternetWeb/Conceptual/CoreBluetooth_concepts/CoreBluetoothBackgroundProcessingForIOSApps/PerformingTasksWhileYourAppIsInTheBackground.html

I enabled the bluetooth-central background mode.

I opt In to State Preservation and Restoration.

let options = [CBCentralManagerOptionRestoreIdentifierKey : "myCentralManagerIdentifier"]
centralManager = CBCentralManager(delegate: self, queue: nil, options: options)

I added Restoration Delegate Method. This method gets called when I first run the app again.

func centralManager(_ central: CBCentralManager, willRestoreState dict: [String : Any]) {

    guard let peripherals = dict[CBCentralManagerRestoredStatePeripheralsKey] as? [CBPeripheral] else {
        return
    }
    
    for peripheral in peripherals {
        // ...
    }

}

The step for launch options doesn't seem to work for me. The launchOptions dictionary is always nil for me.

import SwiftUI
import UIKit

class AppDelegate: NSObject, UIApplicationDelegate {
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
        guard let options = launchOptions else {
            return true
        }
        
        let centralManagerIdentifiers = options[UIApplication.LaunchOptionsKey.bluetoothCentrals]
        return true
    }
}

@main
struct MyApp: App {
    
    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
    
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}