In-App Purchase in Independent watchOS Apps

Hi everyone,
I used In-App Purchase in Independent watchOS App as following SwiftUI code but I cannot get products. It seems that the 'SKProductsRequestDelegate' and 'SKRequestDelegate' protocol are not called.
Please tell me the ways if you used to use IAP in Independent watchOS App in SwiftUI (watchOS 6.2+). Thanks
(My code worked on iOS app (companion version))

Code Block 
class IAPManager: NSObject, ObservableObject {
    static let shared = IAPManager()
    let purchasePublisher = PassthroughSubject<(String, Bool), Never>()
    var totalRestoredPurchases = 0
    var purchaseHandler : ((String,Bool)->Void)? = nil
    private override init() {
        super.init()
    }
    func returnProductIDs() -> [String] {
        return ["com.sample.package01"]
    }
    
    func getProductsV5() {
        let productIDs = Set<String>(returnProductIDs())
        if #available(watchOSApplicationExtension 6.2, *) {
            let request = SKProductsRequest(productIdentifiers: productIDs)
            request.delegate = self
            request.start()
        } else {
            // Fallback on earlier versions
            print("This feature is not supported!")
        }
    }

Code Block 
extension IAPManager: SKProductsRequestDelegate, SKRequestDelegate {
    func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse) {
        let badProducts = response.invalidProductIdentifiers
        let goodProducts = response.products
        if goodProducts.count > 0 {
            ProductsDB.shared.items = response.products
            print("bon ",ProductsDB.shared.items)
        }
        print("badProducts ",badProducts)
    }
    func request(_ request: SKRequest, didFailWithError error: Error) {
        print("didFailWithError ",error.localizedDescription)
        purchasePublisher.send(("Purchase request failed ",true))
    }
    func requestDidFinish(_ request: SKRequest) {
        print("request did finish")
    }
}