Vertical paging with TabView

TabViewPage.swift

struct ContentView: View {
    let colors: [Color] = [
        .red, .green, .blue, .gray
    ]

    var body: some View {
        GeometryReader { proxy in
            TabView {
                ForEach(colors, id: \.self) { color in
                    color // Your cell content
                }
                .rotationEffect(.degrees(-90)) // Rotate content
                .frame(
                    width: proxy.size.width,
                    height: proxy.size.height
                )
            }
            .frame(
                width: proxy.size.height, // Height & width swap
                height: proxy.size.width
            )
            .rotationEffect(.degrees(90), anchor: .topLeading) // Rotate TabView
            .offset(x: proxy.size.width) // Offset back into screens bounds
            .tabViewStyle(
                PageTabViewStyle(indexDisplayMode: .never)
            )
        }
    }
}