Thank you for your sharing.
After adding the custom routes in WaterholeServiceProvider.php, it worked successfully — really appreciate!
Route::prefix('sitemap')->group(function () {
Route::get('/', [\App\Http\Controllers\SitemapController::class, 'index']);
Route::get('/posts', [\App\Http\Controllers\SitemapController::class, 'posts']);
Route::get('/channels', [\App\Http\Controllers\SitemapController::class, 'channels']);
Route::get('/pages', [\App\Http\Controllers\SitemapController::class, 'pages']);
Route::get('/users', [\App\Http\Controllers\SitemapController::class, 'users']);
});
thank you for testing :)