extension DateFormat {
    static let shortDateAndTime = DateFormat(value: "MMM d, E 'at' HH:mm")
    static let shortDay = DateFormat(value: "d")
    static let shortMonth = DateFormat(value: "MMM")
    static let monthAndYear = DateFormat(value: "LLLL YYYY")
    static let shortWeekName = DateFormat(value: "EE")
}

struct ContentView: View {
    @DateFormatterPool(.shortDateAndTime) var shortDateAndTimeFormatter
    
    var body: some View {
        VStack {
            Text(shortDateAndTimeFormatter.string(from: Date())) // Aug 23, Tue at 12:10
        }
    }
}

final class ViewModel {
    @Published var dateString: String
    
    @DateFormatterPool(.shortDateAndTime) var shortDateAndTimeFormatter
    
    //...
    
    func configure() {
        dateString = shortDateAndTimeFormatter.string(from: Date())) // Aug 23, Tue at 12:10
    }
}