To view your Noah's design in your template you have to add the variables in your page.html.twig
<div class="noahs-theme-content-wrapper">
{% if noahs_node_html %}
{{noahs_node_html | raw}}
{% else %}
<div class="wrapper-without-noahs">
<div class="container">
{{page.content}}
</div>
</div>
{% endif %}
</div>
If you are usiging Noah's PRO add use like this:
{% if noahs_header_html %}
<header role="banner" class="noahs-pro-theme--header">
{{noahs_header_html | raw}}
</header>
{% else %}
<header role="banner" class="noahs-theme--header">
{{page.header}}
</header>
{% endif %}
<div class="noahs-theme-tabs">
<div class="container">
<nav>
{{page.tabs}}
</nav>
</div>
</div>
<div class="noahs-theme-content-wrapper">
{% if noahs_node_html %}
{{noahs_node_html | raw}}
{% else %}
<div class="wrapper-without-noahs">
<div class="container">
{{page.content}}
</div>
</div>
{% endif %}
</div>
{% if noahs_footer_html %}
<footer role="banner" class="noash-pro-theme--footer">
{{noahs_footer_html | raw}}
</footer>
{% else %}
<footer role="banner">
{{page.page}}
</footer>
{% endif %}