Resource doesn't show in navigation

<?php

namespace App\Providers\Filament;

use ***

class AdminPanelProvider extends PanelProvider
{
    public function panel(Panel $panel): Panel
    {
        return $panel
            ->default()
            ->brandName('Laravel')
            ->id('admin')
            ->path('admin')
            ->font('Poppins')
            ->login(Login::class)
            ->colors([
                'primary' => Color::Yellow,
            ])
            ->discoverResources(in: app_path('Filament/Resources'), for: 'App\Filament\Resources')
            ->discoverPages(in: app_path('Filament/Pages'), for: 'App\Filament\Pages')
            ->pages([
                Dashboard::class,
            ])
            ->navigationItems([

                NavigationItem::make('Back to website')
                    ->url('https://example.com')
                    ->icon('heroicon-o-link')
                    ->openUrlInNewTab(),

            ])
            ->discoverWidgets(in: app_path('Filament/Widgets'), for: 'App\Filament\Widgets')
            ->viteTheme('resources/css/filament/admin/theme.css')
            ->middleware([
                EncryptCookies::class,
                AddQueuedCookiesToResponse::class,
                StartSession::class,
                AuthenticateSession::class,
                ShareErrorsFromSession::class,
                VerifyCsrfToken::class,
                SubstituteBindings::class,
                DisableBladeIconComponents::class,
                DispatchServingFilamentEvent::class,
            ])
            ->authMiddleware([
                Authenticate::class,
            ]);
    }
}