import SwiftUI

struct SpacersAlignmentDemo: View {
  var body: some View {
    HStack {
      Text("Left"); Spacer(); Text("Right")
    }
    .frame(maxWidth: .infinity, alignment: .leading)
    .padding()
  }
}

                    

import SwiftUI

struct ContentView: View {
  var body: some View { SpacersAlignmentDemo() }
}

                    

import SwiftUI

@main
struct MyApp: App {
  var body: some Scene { WindowGroup { ContentView() } }
}