Count Post in Tag

Show in page tag:

<?php
echo $wp_query->found_posts;
?>

======================

Show dimana saja dengan input spesifik tag (mis: tag merdeka)

<?php
$taxonomy = "post_tag"; // can be category, post_tag, or custom taxonomy name

// Using Term Slug
$term_slug = 'merdeka';
$term = get_term_by('slug', $term_slug, $taxonomy);

// Fetch the count
echo $term->count;
?>