makepuff322

Получилось сделать с помощью гугла

Рабочий код в моем случае:

<?php $current_term_obj = get_queried_object(); { 
	$categories = get_queried_object();
	$count = $categories->count;
	$taxonomy = $categories->taxonomy;
	$args = array(
	'child_of' => $categories->term_id,
	);
	$tax_terms = get_terms($taxonomy, $args);
	foreach ($tax_terms as $tax_term) {
		$count +=$tax_term->count;
	}
	echo $count;
} ?>

Или можно сократить до

$current_term_obj = get_queried_object(); { 
  $categories = get_queried_object();
  $count = $categories->count;
  $taxonomy = $categories->taxonomy;
  
  echo $count;
}