iOS Custom Keyboard Extension Bluetooth Access

Question

I would like to access a bluetooth device from within a Custom Keyboard Extension. However the CBCentralManager will always fall into a .unsupported state. I enabled RequestsOpenAccess in info.plist > NSExtension.

Does anyone else faced the same issue?

My code is as follows. It's based on Apples default Custom Keyboard Extension target code.

class KeyboardViewController: UIInputViewController {
    @IBOutlet var nextKeyboardButton: UIButton!
    internal var manager: BLManager?
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Perform custom UI setup here
        self.nextKeyboardButton = UIButton(type: .system)
        self.nextKeyboardButton.setTitle(NSLocalizedString("Next Keyboard", comment: "Title for 'Next Keyboard' button"), for: [])
        self.nextKeyboardButton.sizeToFit()
        self.nextKeyboardButton.translatesAutoresizingMaskIntoConstraints = false
        self.nextKeyboardButton.addTarget(self, action: #selector(handleInputModeList(from:with:)), for: .allTouchEvents)
        self.view.addSubview(self.nextKeyboardButton)
        self.nextKeyboardButton.leftAnchor.constraint(equalTo: self.view.leftAnchor).isActive = true
        self.nextKeyboardButton.bottomAnchor.constraint(equalTo: self.view.bottomAnchor).isActive = true
    }
    
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        print("> BL - Keyboard")
        manager = BLManager.shared
    }
    
    override func viewWillLayoutSubviews() {
        self.nextKeyboardButton.isHidden = !self.needsInputModeSwitchKey
        super.viewWillLayoutSubviews()
    }
}

With a corresponding BLManager object.

internal class BLManager: NSObject, CBCentralManagerDelegate {
    public static var shared: BLManager = BLManager()
    public var manager: CBCentralManager
    
    override init() {
        manager = CBCentralManager(delegate: nil, queue: nil)
        super.init()
        manager.delegate = self
    }
    
    func centralManagerDidUpdateState(_ central: CBCentralManager) {
        if central.state == .poweredOn {
            manager.scanForPeripherals(withServices: nil, options: nil)
        }
        print("> BL \(central.state)")
    }
}