Lacking implementation of LinkPreview in SwiftUI

LinkPreviewFail.swift

struct ContentView: View {
    var body: some View {
        VStack {
            URLPreview(previewURL: URL(string: "https://medium.com")!)
                .aspectRatio(contentMode: .fit)
                .padding()
        }
        
    }
}

struct URLPreview : UIViewRepresentable {
    var previewURL:URL

    func makeUIView(context: Context) -> LPLinkView {
        let view = LPLinkView(url: previewURL)
        
        let provider = LPMetadataProvider()

        provider.startFetchingMetadata(for: previewURL) { (metadata, error) in
            if let md = metadata {
                DispatchQueue.main.async {
                    view.metadata = md
                    view.sizeToFit()
                }
            }
        }
        
        return view
    }
    
    func updateUIView(_ uiView: LPLinkView, context: UIViewRepresentableContext<URLPreview>) {
    }
}