Related posts on Oxygen Builder's Easy Posts. https://solusipress.com/menampilkan-related-posts-pada-oxygen-builder/

query-params

post_type=post&posts_per_page=5&sp_related=yes

snippet-related-posts.php

<?php
function solusipress_adjust_related_post_query( $query ) {
    if( !is_admin() && isset( $query->query['sp_related'] ) && $query->query['sp_related'] == 'yes' ) {
        global $post;
        $query->set( 'post__not_in', array( $post->ID ) );
        $tags = wp_get_post_tags( $post->ID );
        $_query = array();
        if( is_array( $tags ) && !empty( $tags ) ) {
            $_terms = array();
            foreach( $tags as $tag ) {
                array_push( $_terms, $tag->slug );
            }
            array_push( $_query, [
                'taxonomy' => 'post_tag',
                'field' => 'slug',
                'terms' => $_terms
            ] );
        }
        $categories = get_the_category();
        if( is_array( $categories ) && !empty( $categories ) ) {
            $_cat = array();
            foreach( $categories as $category ) {
                array_push( $_cat, $category->slug );	
            }
            array_push( $_query, [
                'taxonomy' => 'category',
                'field' => 'slug',
                'terms' => $_cat
            ] );
        }
        if( count( $_query ) > 1 ) {
            $_query['relation'] = 'OR';
        }
        if( !empty( $_query ) ) {
            $query->set( 'tax_query', $_query );
        }
    }     
}
add_action( 'pre_get_posts', 'solusipress_adjust_related_post_query' );

template.css

%%EPID%% .oxy-posts {
  display: flex;
  flex-direction: column;
}
%%EPID%% .oxy-post {
  display: flex;
  flex-direction: column;
  text-align: left;
  align-items: flex-start;
  margin-bottom: 10px;
  border-bottom: 1px solid #f4f4f4;
}
%%EPID%% .oxy-post-image {
  margin-top: 1em;
  margin-bottom: 1em;
  width: 100%;
}
%%EPID%% .oxy-post-title {
  font-size: 13px;
  font-weight:bold;
  line-height: 1.2em;
  color: #333;
}
%%EPID%% .oxy-post-content {
  margin-top: 1em;
  margin-bottom: 1em;
}
%%EPID%% .oxy-post-content p {
  margin: 0;
}
%%EPID%% .ct-new-columns {
  padding-top: 0px;
}
%%EPID%% .ct-new-columns .post-thumbnail.ct-div-block {
  width: 25%;
  padding:0px;
}
%%EPID%% .ct-new-columns .oxy-post-content.ct-div-block {
  width: 75%;
  padding:0px 15px;
}
%%EPID%% .oxy-easy-posts-pages { display:none; }

template.php

<div class='oxy-post'>
  <div class="ct-new-columns">
    <div class="post-thumbnail ct-div-block">
      <?php 
      if (has_post_thumbnail()) {
        ?>
        <a href='<?php the_permalink(); ?>'><img src='<?php the_post_thumbnail_url(); ?>' class='oxy-post-image' /></a>
        <?php
      }
      ?>
    </div>
    <div class="oxy-post-content ct-div-block">
      <a class='oxy-post-title' href='<?php the_permalink(); ?>'><?php the_title(); ?></a>
    </div>
  </div>
</div>