Blocksy Add Product Tab with Content Block

woo-new-tab-with-hook.php

<?php
add_filter( 'woocommerce_product_tabs', function ( $tabs ) {
	$tabs['my_tab'] = array(
		'title' 	=> __( 'Blocksy Tab', 'woocommerce' ),
		'priority' 	=> 20,
		'callback' => function() { echo do_shortcode( '[blocksy-content-block id="5870"]' ); }
	);
  return $tabs;
} );