My solution to https://github.com/objcio/swiftui-challenges/blob/master/challenge4.md

challenge4solution.swift

struct ContentView: View {
    var body: some View {
        VStack(alignment: .customAlignment) {
            HStack {
                Text("100 m").font(Font.body.bold())
                Text("Usain Bolt").setCustomAlignmentToLeading()
            }
            HStack {
                Text("5 km").font(Font.body.bold())
                Text("Joshua Cheptegei").setCustomAlignmentToLeading()
            }
            HStack {
                Text("10 km").font(Font.body.bold())
                Text("Rhonex Kipruto").setCustomAlignmentToLeading()
            }
            HStack {
                Text("Marathon").font(Font.body.bold())
                Text("Eliud Kipchoge").setCustomAlignmentToLeading()
            }
        }  
    }
}

extension View {
    func setCustomAlignmentToLeading() -> some View {
        self.alignmentGuide(HorizontalAlignment.customAlignment, computeValue: { $0[.leading] })
    }
}

extension HorizontalAlignment {
    private enum CustomAlignment: AlignmentID {
        static func defaultValue(in d: ViewDimensions) -> CGFloat {
            return d[.leading]
        }
    }

    static let customAlignment = HorizontalAlignment(CustomAlignment.self)
}