import SwiftUI

struct ExamplePageTabView: View {
    @State var numbers: [Number] = []
    
    var body: some View {
        TabView {
            ForEach(numbers) { number in
                Text("Number \(number.number)")
            }
        }
        .background(Color.red)
        .tabViewStyle(PageTabViewStyle())
        .onAppear(perform: {
            DispatchQueue.main.asyncAfter(deadline: .now() + 3) {
                numbers = [Number(id: 1, number: 1), Number(id: 2, number: 2)]
            }
        })
    }
}

struct ExamplePageTabView_Previews: PreviewProvider {
    static var previews: some View {
        ExamplePageTabView()
    }
}

struct Number: Identifiable {
    let id: Int
    let number: Int
}