grav/themes/project-space/templates/partials/metadata.html.twig

{% for meta in page.metadata %}
<meta {% if meta.name %}name="{{ meta.name }}" {% endif %}{% if meta.http_equiv %}http-equiv="{{ meta.http_equiv }}" {% endif %}{% if meta.charset %}charset="{{ meta.charset }}" {% endif %}{% if meta.property %}property="{{ meta.property }}" {% endif %}{% if meta.content %}content="{{ meta.content|raw }}" {% endif %}/>
{% endfor %}