Laravel Cloud Navigation in Filament v4: Full tutorial and code https://silvanhagen.com/writing/laravel-cloud-navigation-in-filament/

AdminPanelProvider.php

<?php

namespace App\Providers\Filament;

class AdminPanelProvider extends PanelProvider
{
    public function panel(Panel $panel): Panel
    {
        return $panel
            // your other panel config
            ->topNavigation();
    }
}