Trying show another view but can only dismiss existing views - SwiftUI - swift

Question

I am working on a sign up page. I want to show the main view after the sign up process is finished, but I have a problem like this;
OnBoardingView presents the SignUp view and when the signup process is finished, I update the currentUser. When I debug, the if statement works and the line where the main view is executed, but I see the first step of the signUp view presented by the onboardingView on the screen. As if only opened sheets are closed.
I draw the situation https://i.imgur.com/bUJF1Rv.png
ContentView:
struct ContentView: View {
#EnvironmentObject var appEnvironment: AppEnvironment
var body: some View {
if appEnvironment.currentUser == nil {
OnboardingView()
} else {
MainView()
}
}
}
SignUpService
final class SignUpService {
static let shared = SignUpService()
func completeSignUp() async {
let progress = SignUpProgress.shared
let auth = FirebaseManager.shared.auth
guard
let email = progress.email,
let password = progress.password,
let photoData = progress.profilePhotoData
else { return }
do {
let result = try await auth.createUser(withEmail: email, password: password)
let photoUrl = try await result.user.saveProfilePhoto(data: photoData)
progress.profileImageUrl = photoUrl
if let userDetail = progress.createSaveUserDetailModel() {
try await result.user.saveUserDetail(userDetail)
DispatchQueue.main.async {
AppEnvironment.default.currentUser = result.user
}
}
} catch {
print(error)
}
}
}
Last Page of the SignUp Steps where I call the SignUpService:
//Other things
func didContinueTapped() {
SignUpProgress.shared.disinterests = Array(selecteds)
showIndicator = true
Task(priority: .background) {
await SignUpService.shared.completeSignUp()
DispatchQueue.main.async {
self.showIndicator = false
}
}
}
//Other things
AppEnvironment:
final class AppEnvironment: ObservableObject {
static let `default` = AppEnvironment()
#Published var currentUser: User?
}
Main:
#main
struct AnApp: App {
#StateObject var appEnvironment: AppEnvironment = .default
#UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
var body: some Scene {
WindowGroup {
ContentView()
.environmentObject(appEnvironment)
}
}
}
final class AppDelegate: NSObject, UIApplicationDelegate {
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
FirebaseApp.configure()
return true
}
}