Proper way to handle backwards compatibility of iOS widgets

widgets.swift

import WidgetKit
import SwiftUI

@main
struct WidgetExtMain {
    static func main() {
        if #available(iOS 18.0, *) {
            MyWidgets_18.main()
        } else {
            MyWidgets_17.main()
        }
    }
}

@available(iOS 17.0, *)
struct MyWidgets_17: WidgetBundle {
    var body: some Widget {
        TriviaPalWidget()
        PixelPalsLiveActivity()
    }
}


@available(iOS 18.0, *)
struct MyWidgets_18: WidgetBundle {
    var body: some Widget {
        TriviaPalWidget()
        HeartControlWidget()
        PixelPalsLiveActivity()
    }
}