Create custom template for comments in Wordpress. You can use the above code in functions.php during theme or plugin development.

wordpress-custom-comment-template.php

# comments.php
# update comments.php in child theme

<div class="comment-list">
  <?php

      // ref: https://codex.wordpress.org/Function_Reference/wp_list_comments#Arguments

      $args = [
          'walker'            => null,
          'max_depth'         => '',
          'style'             => 'div',
          'callback'          => 'commentsHTML5',
          'end-callback'      => null,
          'type'              => 'all',
          'reply_text'        => 'Reply',
          'page'              => '',
          'per_page'          => '',
          'avatar_size'       => 32,
          'reverse_top_level' => null,
          'reverse_children'  => '',
          'format'            => 'html5', // or 'xhtml' if no 'HTML5' theme support
          'short_ping'        => false,   // @since 3.6
          'echo'              => true     // boolean, default is true
      ];
      wp_list_comments($args);
  ?>
  </div><!-- .comment-list -->

# commentsHTML5 is the callback that you'll use to customize the comment template

# functions.php (or wherever you want)

function commentsHTML5(){
    $comment = get_comment();
    $id = $comment->comment_ID;
    $author = $comment->comment_author;
    $author_url = $comment->comment_author_url;
    $date = $comment->comment_date;
    $content = $comment->comment_content;
    $o = '';

    ?>
        <div class="row">
            <div class="col col-2 col-12-small">
                <?php
                    $args = [
                        'class' => 'image',
                    ];
                    echo get_avatar( $id, '96', '', $author, $args ); ?></div>
            <div class="col col-10 col-12-small">
                <?php
                    $reply = __('Replied by', 'mrwooo-strata');
                    $url = ($author_url == true ? $author_url : '');
                    $on = __('on', 'mrwooo-strata');
                    $str = '%s <a href="%s" title="'.$author.'">'.$author.'</a> %s '.$date;

                    $o .= '<p>'.$content.'</p>';
                    $o .= '<small>'.sprintf($str, $reply, $url, $on).'</small>';
                    echo $o;
                ?>
            </div>
        <!-- accordling to codex don't close the last tag -->
    <?php
}