Added twig suggestion is not used
Replace the underscore characters with hyphens, and clear the cache.

The template filename should be views--view--taxonomy--term.html.twig.

   function mediumish_blog_theme_suggestions_views_view_alter(array &amp;$suggestions, array $variables) {
      if (\Drupal::routeMatch()-&gt;getRouteName() == 'entity.taxonomy_term.canonical' &amp;&amp; $tid = \Drupal::routeMatch()-&gt;getRawParameter('taxonomy_term')) {
       $term = Term::load($tid);
       $suggestions[] = 'views__view__taxonomy__term';
     }
   }