I have created a horizontal scroll view containing many items. I am trying to, every time I update or delete an item, to save the item's index, so that an automatic scrolling can be performed to the position where the the item is or was. What I am struggling to understand is why I can't assign the index to the variable lastItemIndex. Could you please check what is wrong with my code and how to make it work correctly?

struct ItemsCollectionView: View {
    @ObservedObject var itemsDataSource: ItemsDataSource
    @State private var lastItemIndex: Int = 0

    public var body: some View {
        ScrollViewReader { scrollView in

            HStack {
                ForEach(Array(itemsDataSource.items.enumerated()), id: \.offset) { index, item in
                    ItemView(
                        content: ItemViewContentProvider.content(
                            item: item,
                            onItemTapped: { item in
                                self.assignIndex(index)
                                itemsDataSource.add(item)
                            },
                            onDelete: { item in
                                self.assignIndex(index)
                                itemsDataSource.remove(item)
                            })
                    )
                }
            }.onAppear {
                scrollView.scrollTo(lastItemIndex)
            }
        }
    }

    func assignIndex(_ index: Int) {
        lastItemIndex = index
    }
}

struct ItemView: View {
    let content: ItemViewContent

    var body: some View {
        HStack {
            Button(action: {
                content.onitemTapped(content.item)
            }, label: {
                Text(content.itemTitle)
                    .font(.copy)
                    .foregroundColor(.contentLead)
            })
            Button(action: {
                content.onDelete(content.item)
            }, label: {
                Image(uiImage: .icons.close)
                    .resizable()
                    .frame(width: 10, height: 10)
                    .foregroundColor(.contentSecondary)
            })
        }
        .padding(.horizontal, 8)
        .background(Rectangle()
            .foregroundColor(.backgroundSecondary)
            .cornerRadius(4)
            .frame(height: 30))
        .frame(height: 30)
    }
}