Xamarin Forms Toolbaritems are not show

Question

I'm trying to create toolbaritems in my root page. Toolbaritems arent show only in startup page, if i navigate to new page, they are there.

Fragment xaml

<?xml version="1.0" encoding="utf-8" ?>
<local:CoolContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:d="http://xamarin.com/schemas/2014/forms/design"
             xmlns:local="clr-namespace:FBAndroid"      
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             EnableBackButtonOverride="False"
             mc:Ignorable="d"
             Title="Logowanie"
             ControlTemplate="{StaticResource Key=PageWithGradient}"
             x:Class="FBAndroid.Pages.LoginPage">


<NavigationPage.TitleView>
        <Label Text="Logowanie" FontSize="24" />
    </NavigationPage.TitleView>
    
    <ContentPage.ToolbarItems>
        <ToolbarItem x:Name="tbi_options" Text="Ustawienia"    Priority="0" Order="Default" Clicked="Tbi_options_Clicked" />
        <ToolbarItem x:Name="tbi_exit"  Text="Zakończ"  Priority="1" Order="Default" Clicked="tbi_cofnij_Clicked"/>
    </ContentPage.ToolbarItems>

in App()

            MainPage = new NavigationPage(new LoginPage())
            {
                BarBackgroundColor = Color.FromHex("#AD2728"),
                BarTextColor = Color.Black
            };

And MainActivity fragment because if i remove SetSupportActionBar(toolbar) than will show toolbaritems on my root page.

namespace FBAndroid.Droid
{
    [Activity(Label = "FBAndroid", Icon = "@mipmap/icon", Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
    public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
    {
        protected override void OnCreate(Bundle savedInstanceState)
        {
            TabLayoutResource = Resource.Layout.Tabbar;
            ToolbarResource = Resource.Layout.Toolbar;

            base.OnCreate(savedInstanceState);

            Xamarin.Essentials.Platform.Init(this, savedInstanceState);
            global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
            CheckAppPermissions();
            LoadApplication(new App());

            Android.Support.V7.Widget.Toolbar toolbar = this.FindViewById<Android.Support.V7.Widget.Toolbar>(Resource.Id.toolbar);
            if (toolbar != null)
            {
                SetSupportActionBar(toolbar);
            }
        }

How make that the SetSupportActionBar (i used that for override navigation back button. Solution from theconfuzedsourcecode) not necessary to remove and toolbar items has been show.