I can load PHLivephoto with loadTransferable(type: PHLivePhoto.self).
But I could not load livephoto loadTransferable(type: LivephotoTrasferable.self)

in which the LivephotoTrasferable is as below:

struct LivephotoTrasferable: Transferable {
    static var transferRepresentation: some TransferRepresentation {
        FileRepresentation(contentType: .livePhoto) { item in
            SentTransferredFile(item.url)
        } importing: { file in
            print("livephoto!")
            return Self.init(url: file.file)
        }
    }
    
    var url: URL
}

The whole code snippet is:

struct ContentView: View {
    @State private var selection: PhotosPickerItem?
    
    var body: some View {
        VStack {
            PhotosPicker(selection: $selection) {
                Text("Import image")
            }
            .buttonStyle(.borderedProminent)
            .onChange(of: selection) { oldValue, newValue in
                if let item = newValue {
                    self.loadTransferable(item)
                    self.selection = nil
                }
            }
        }
        .padding()
    }
    
    func loadTransferable(_ item: PhotosPickerItem) {
        Task {
            let livephoto = try? await item.loadTransferable(type: PHLivePhoto.self)
            let livephoto2 = try? await item.loadTransferable(type: LivephotoTrasferable.self)
            print(livephoto != nil, livephoto2 != nil) // true, false
        }
    }
}

struct LivephotoTrasferable: Transferable {
    static var transferRepresentation: some TransferRepresentation {
        FileRepresentation(contentType: .livePhoto) { item in
            SentTransferredFile(item.url)
        } importing: { file in
            print("livephoto!")
            return Self.init(url: file.file)
        }
    }
    
    var url: URL
}