AdminPanelProvider.php

<?php

namespace App\Providers\Filament;

use App\Filament\CustomLogin;
use App\Http\Middleware\RedirectIfNotFilamentAdmin;
use Filament\Http\Middleware\Authenticate;
use Filament\Http\Middleware\DisableBladeIconComponents;
use Filament\Http\Middleware\DispatchServingFilamentEvent;
use Filament\Pages;
use Filament\Panel;
use Filament\PanelProvider;
use Filament\Support\Colors\Color;
use Filament\Widgets;
use Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse;
use Illuminate\Cookie\Middleware\EncryptCookies;
use Illuminate\Foundation\Http\Middleware\VerifyCsrfToken;
use Illuminate\Routing\Middleware\SubstituteBindings;
use Illuminate\Session\Middleware\AuthenticateSession;
use Illuminate\Session\Middleware\StartSession;
use Illuminate\View\Middleware\ShareErrorsFromSession;

class AdminPanelProvider extends PanelProvider
{
    public function panel(Panel $panel): Panel
    {
        return $panel
            ->default()
            ->id('admin')
            ->path('admin')
            ->login()
            ->colors([
                'primary' => Color::Amber,
            ])
            ->discoverResources(in: app_path('Filament/Admin/Resources'), for: 'App\\Filament\\Admin\\Resources')
            ->discoverPages(in: app_path('Filament/Admin/Pages'), for: 'App\\Filament\\Admin\\Pages')
            ->pages([
                Pages\Dashboard::class,
            ])
            ->discoverWidgets(in: app_path('Filament/Admin/Widgets'), for: 'App\\Filament\\Admin\\Widgets')
            ->widgets([
                \App\Livewire\LoggedUserInfo::class,
                Widgets\FilamentInfoWidget::class,
            ])
            ->middleware([
                EncryptCookies::class,
                AddQueuedCookiesToResponse::class,
                StartSession::class,
                AuthenticateSession::class,
                ShareErrorsFromSession::class,
                VerifyCsrfToken::class,
                SubstituteBindings::class,
                DisableBladeIconComponents::class,
                DispatchServingFilamentEvent::class,
            ])
            ->authMiddleware([
                Authenticate::class,
                RedirectIfNotFilamentAdmin::class, <-- Add this code
            ]);
    }
}

RedirectIfNotFilamentAdmin.php

<?php

namespace App\Http\Middleware;

use App\Providers\RouteServiceProvider;
use Closure;
use Filament\Facades\Filament;
use Filament\Models\Contracts\FilamentUser;
use Illuminate\Http\Request;
use Symfony\Component\HttpFoundation\Response;
use Illuminate\Auth\Middleware\Authenticate as Middleware;
use Illuminate\Support\Facades\Auth;

class RedirectIfNotFilamentAdmin 
{
    public function handle(Request $request, Closure $next, string ...$guards): Response
    {
        $guard = Filament::auth();
        $user = $guard->user();

        if ($user->role == 'employee' && Filament::getPanel('employee')->getPath() != $request->path()) {
            return redirect('/employee');
        }

        return $next($request);
    }
}