theme

/**
 * Implements hook_preprocess_HOOK() for layout.html.twig.
 */
function hook_preprocess_layout(&$variables) {
  $layout = $variables['layout'];
  foreach ($layout->getRegionNames() as $region_name) {
    if (array_key_exists($region_name, $variables['content'])) {
      uasort($variables['content'][$region_name], [\Drupal\Component\Utility\SortArray::class, 'sortByWeightProperty']);
    }
  }
}

<?php

namespace Drupal\scp_base\Routing;

use Drupal\Core\Routing\RouteSubscriberBase;
use Symfony\Component\Routing\RouteCollection;

class RouteSubscriber extends RouteSubscriberBase {

  /**
   * {@inheritdoc}
   */
  protected function alterRoutes(RouteCollection $collection) {
    // Make sure profile pages are not admin pages, in order to load the right
    // translation.
    if ($route = $collection->get('profile.user_page.single')) {
      $route->setOption('_admin_route', FALSE);
    }
  }

}