Your code will only display a list of your posts if the page that is using that template is set to be the Posts Page (in admin settings).
If you want any other page to display a list of posts, then you need to write a custom query inside the template.
E.g. using WP_Query
:
$args = array(
'post_type' => 'post',
'posts_per_page' => -1
);
$query = new WP_Query($args);
<div class="content">
<?php
if ( $query->have_posts() ) : ?>
<div class="container">
<div class="row">
<?php while ( $query->have_posts() ) : $query->the_post();?>
<?php get_template_part( 'template-parts/blog-2-col', get_post_format() );?>
<?php endwhile; ?>
</div><!-- row -->
</div><!-- ontainer -->
<div class="container">
<div class="row">
<div class="col-sm-12">
<?php wpbeginner_numeric_posts_nav(); ?>
</div>
</div>
</div>
<?php else :?>
<?php get_template_part( 'template-parts/content', 'none' );?>
<?php endif; ?>
Or, you could create a shortcode
which would contain pretty much the same code as above. And then you could use that shortcode in the page’s content. Then, in the template:
if(have_posts()){
while(have_posts()){
the_post();
the_content();
}
}