macOS: Settings window positioning - swift

Question

I would like to position the Settings window, e.g.:
Horizontal: centered in the screen
Vertical: 200px from screen top
The code below does position it, but with some delay. It first appears where the system decides to put it, then my positioning is applied. I would like to avoid this "flash" effect.
import SwiftUI
#main
struct MacosPlaygroundApp: App {
var body: some Scene {
WindowGroup("Playground") {
Text("Hello, World!")
.frame(width: 700, height: 300, alignment: .center)
}
Settings {
SettingsView()
}
}
}
struct SettingsView: View {
#State private var selectedTab: SettingsTab = .first
var body: some View {
TabView {
Text("First settings")
.tabItem { Label("First", systemImage: "1.square") }
.tag(SettingsTab.first)
Text("Second settings")
.tabItem { Label("Second", systemImage: "2.square") }
.tag(SettingsTab.second)
}
.frame(width: 400, height: 200, alignment: .top)
.onAppear {
// I wrap it in a Task because `settingsWindow` would be `nil` otherwise
Task {
guard let settingsWindow = NSApplication.shared.windows.first(where: { $0.title == windowTitle }) else { return }
guard let screen = settingsWindow.screen else { return }
let settingsWindowSize = settingsWindow.frame.size
let screenSize = screen.frame.size
let left = (screenSize.width - settingsWindowSize.width) / 2
let bottom = screenSize.height - 200
settingsWindow.setFrameTopLeftPoint(NSPoint(x: left, y: bottom))
}
}
}
var windowTitle: String {
switch selectedTab {
case .first:
return "First"
case .second:
return "Second"
}
}
enum SettingsTab {
case first
case second
}
}