Route::get('sitemap.xml', 'SitemapController@index');

class LaravelSitemapController extends Controller
{
    public function index(Request $request)
    {
        $sitemap = new Kolirt\Sitemap\Sitemap;
        $lastMode = Carbon::create(2020, 4, 21, 14, 00, 00);
        $sitemap->setDomain('https://site.com');
        $sitemap->addUrl('', $lastMode, Kolirt\Sitemap\Sitemap::CHANGE_FREG_DAILY, 1);
        $products = [1, 2, 3, 4, 5, 6];
        foreach ($products as $product) {
            $sitemap->addUrl('products/' . $product, $lastMode, Kolirt\Sitemap\Sitemap::CHANGE_FREG_DAILY, 0.8);
        }
        $sitemap->addUrl('page1', $lastMode, Kolirt\Sitemap\Sitemap::CHANGE_FREG_WEEKLY, 0.6);
        $sitemap->addUrl('page2', $lastMode, Sitemap::CHANGE_FREG_MONTHLY, 0.5);
        return $sitemap->render();
    }
}