pgmb_raw_post_content.php

<?php
function pgmb_raw_content_variable($variables, $parent_post_id){
  $post = get_post($parent_post_id);
  $text = wpautop($post->post_content); //Add paragraph tags
  //$text = preg_replace("~(?:\[/?)[^\]]+/?\]~s", '', $text); //Strip shortcodes
  $text = do_shortcode($text);
  
  $parse_html = new \PGMB\Vendor\Html2Text\Html2Text(
    $text,
    array(
      'width'    => 0,
      'do_links'  => true
    )
  );
  $text = $parse_html->getText();
  $text = trim($text);
  
	$variables['%post_content_raw%'] = $text;
	return $variables;
}
add_filter('mbp_placeholder_variables', 'pgmb_raw_content_variable', 10, 2);