H2 tags for Main Menu and Breadcrumbs

You're right that using H2 tags for the Main Menu and Breadcrumbs could have SEO implications, as it may disrupt the heading hierarchy of the page.

The H2 tags are likely coming from the theme's default Twig template for these elements. To fix this, you can override the menu.html.twig or breadcrumb.html.twig file in your theme:

{# menu--main.html.twig #}
<nav class="menu">
  <ul>
    {% for item in items %}
      <li>{{ item.title }}</li>
    {% endfor %}
  </ul>
</nav>

This change ensures proper semantic structure while maintaining accessibility. Don't forget to clear the cache after applying the changes!
Let me know if you'd like further assistance with testing or creating a patch."