CryptoTokenKit: TKSmartCardSlotManager.default is nil on macOS (Designed for iPad) but works on iPadOS and macOS

I have an iOS/iPadOS app and 'm trying to communicate with usb smart card reader using CryptoTokenKit on all platforms (ios/ipados/macos).

Minimal Repro Code

import CryptoTokenKit
import SwiftUI

struct ContentView: View {
@State var status = ""
var body: some View {
    VStack {
        Text("Status: \(status)")
    }
    .padding()
    .onAppear {
        let manager = TKSmartCardSlotManager.default
        if manager != nil {
            status = "Initialized"
        } else {
            status = "Unsupported"
        }
    }
}

}

And my entitlement file has only one key: com.apple.security.smartcard = YES

Behavior

•	iPadOS (on device): status = "Initialized" ✅
•	macOS (native macOS app, with the required CryptoTokenKit entitlement): status = "Initialized" ✅
•	macOS (Designed for iPad, regardless of CryptoTokenKit entitlement): status = "Unsupported" → TKSmartCardSlotManager.default is nil ❌

Expectation

Given that the same iPadOS build initializes TKSmartCardSlotManager, I expected the iPad app running in Designed for iPad mode on Apple silicon Mac to behave the same (or to have a documented limitation).

Questions

1. Is CryptoTokenKit (and specifically TKSmartCardSlotManager) supported for iPad apps running on Mac in Designed for iPad mode?

2. If support exists, what entitlements / capabilities are required for USB smart-card access in this configuration?

3. If not supported, is Mac Catalyst the correct/only path on macOS to access USB smart-card readers via CryptoTokenKit?

4. Are there recommended alternatives for iPad apps on Mac (Designed for iPad) to communicate with USB smart-card readers (e.g., ExternalAccessory, DriverKit, etc.), or is this scenario intentionally unsupported?

Thanks!