In the view whose code you see below I have a button that calls the searchView function. It displays an alert and in it we enter the number by which we are looking for an object and this object is returned by the getSong function. Up to this point everything is working fine. The problem I have encountered is that it now calls view and passes this found object, but the view does not refresh. I must have made some mistake that I can't locate or that I have forgotten. I would appreciate some help with this.

struct DetailView: View {
    @State var song : Song
    @State var isSelected: Bool
    var body: some View {
        VStack{
            Text(song.content ?? "No content")
                .padding()
            Spacer()
        }
        .navigationBarTitle("\(song.number). \(song.title ?? "No title")", displayMode: .inline)
        .toolbar {
            ToolbarItemGroup(placement: .navigationBarTrailing) {
                HStack{
                    Button(action: {
                        song.favorite.toggle()
                        isSelected=song.favorite
                    }) {
                        Image(systemName: "heart.fill")
                            .foregroundColor(isSelected ? .red : .blue)
                    }

                    Button(action: {
                        searchView()
                    }) {
                        Image(systemName: "magnifyingglass")
                    }
                }
            }
        }
    }
    func searchView(){

        let search = UIAlertController(title: "Go to the song", message: "Enter the number of the song you want to jump to.", preferredStyle: .alert)
        search.addTextField {(number) in
            number.placeholder = "Song number"
        }

        let go = UIAlertAction(title: "Go", style: .default) { (_) in
            let songFound = PersistenceController.shared.getSong(number: (search.textFields![0].text)!)
            DetailView(song: songFound!, isSelected: songFound!.favorite)
        }
        let cancel = UIAlertAction(title: "Cancel", style: .destructive) { (_) in
            print("Cancel")
        }
        search.addAction(cancel)
        search.addAction(go)

        UIApplication.shared.windows.first?.rootViewController?.present(search, animated: true, completion: {

        })
    }
}