How can I hide the back button from certain pages in the shell?

Only on the login and notifications pages I wish that the user could not return to the previous page. On all other pages the process can proceed normally.

So far, I've only been able to disable the button click action using BackButtonBehavior IsEnabled = "False".

NotificationsPage.xaml and LoginPage.xaml

<Shell.BackButtonBehavior>
        <BackButtonBehavior IsEnabled="False"/>
</Shell.BackButtonBehavior>

TokenViewModel

await Shell.Current.GoToAsync($"{nameof(NotificacoesPage)}");

App.xaml.cs

await Shell.Current.GoToAsync($"{nameof(NotificacoesPage)}", false);

AppShell.xaml

<TabBar>
        <Tab Icon="notificacao_icone.png"
             Title="Notificações">
            <ShellContent ContentTemplate="{DataTemplate local:NotificacoesPage}" />
        </Tab>

        <Tab Icon="configuracoes_icone.png"
             Title="Configurações">
            <ShellContent ContentTemplate="{DataTemplate local:ConfiguracoesPage}" />
        </Tab>
</TabBar>

AppShell.xaml.cs

Routing.RegisterRoute(nameof(LoginPage), typeof(LoginPage));
Routing.RegisterRoute(nameof(TokenPage), typeof(TokenPage));
Routing.RegisterRoute(nameof(NotificacoesPage), typeof(NotificacoesPage));
Routing.RegisterRoute(nameof(NotificacaoDetalhePage), typeof(NotificacaoDetalhePage));
Routing.RegisterRoute(nameof(ConfiguracoesPage), typeof(ConfiguracoesPage));