Correct use of Navigation Stack when first starting app

[munkii]

On App Start we check if this is the FirstRunEver. If not go to HomeViewModel else go to FirstRunViewModel. FirstRun has no Navigation bar. One we introduce the app in FirstRun we navigate the user to HomeViewModel. That page also has no Navigation bar

The way I have currently implemented this is that in the PrismAppBuilder action on app start I have:

 Type viewModelToShow = null;

 if (VersionTracking.IsFirstLaunchEver == false)
 {
     viewModelToShow = typeof(HomeViewModel);
 }
 else
 {
     viewModelToShow = typeof(FirstRunViewModel);
 }

 prism.CreateWindow( 
             string.Format("NavigationPage/{0}", viewModelToShow.Name),
             HandleNavigationError);

When moving the user on from FirstRunViewModel I have:

await this.NavigationService.NavigateAsync($"../{typeof(HomeViewModel).Name}");

but I did look at the the PrismMauiDemo and in particular SplashPageViewModel and saw this:

 _navigationService.CreateBuilder()
     .UseAbsoluteNavigation()
     .AddSegment<RootPageViewModel>()
     .Navigate();

That to me looks like restarting the Navigation based on the use of UseAbsoluteNavigation. Why AddSegment rather than simply navigating to RootPage?

As I was unsure of the use of UseAbsoluteNavigation and AddSegment I went with NavigateAsync($"../{typeof(HomeViewModel).Name}"). As there is nothing else in the Naviogation stack other than FirstRunViewModel at that stage I assume I am achieving the same thing as , UseAbsoluteNavigation yes?

Is it wrong that I am loading FirstRunViewModel in a NavigationPage?