Haking Wiz Swift for WWDC2020 This website is very helpful and has lots of funs examples, actually! https://www.hackingwithswift.com/articles/221/whats-new-in-swiftui-for-ios-14
The demo of Build SwiftUI views for widgets session at wwdc2020 https://developer.apple.com/videos/play/wwdc2020/10033
This is the widget tutorial part1 at WWDC2020 https://developer.apple.com/documentation/widgetkit/creating-a-widget-extension https://developer.apple.com/forums/tags/wwdc20-10034