How do I implement infinite scrolling in Combine with Swift?

import SwiftUI
import Combine

struct ContentView: View {
    @State private var items: [String] = []
    @State private var isLoading: Bool = false
    @State private var page: Int = 0

    var body: some View {
        List {
            ForEach(items, id: \.self) { item in
                Text(item)
            }
            if isLoading {
                ProgressView()
                    .onAppear(perform: loadMore)
            }
        }
        .onAppear(perform: loadMore)
    }

    func loadMore() {
        guard !isLoading else { return }
        isLoading = true

        let newPage = page + 1
        DispatchQueue.main.asyncAfter(deadline: .now() + 1.5) {
            let newItems = (1...20).map { "Item \($0 + (newPage - 1) * 20)" }
            items.append(contentsOf: newItems)
            page = newPage
            isLoading = false
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}