function.php

<?php

// http://www.example.com/wp-admin/admin-post.php?action=update_all_products
add_action('admin_post_update_all_products', 'update_all_products');
function update_all_products() {
	$args = array(
		'post_type'      => 'product',
		'posts_per_page' => 1, // para testar só com 1
	);
	
	$loop = new WP_Query( $args );
	
	while ( $loop->have_posts() ) : $loop->the_post();
		global $product;
	
		// product ID
		$product_id = $product->get_id();
		echo $product_id . PHP_EOL;
		// sku
		$product_sku = $product->get_sku();
		echo $product_sku . PHP_EOL;
		// Title
		$product_title = $product->get_name();
		echo $product_title . PHP_EOL;
	
		update_post_meta($product_id, 'product_info_cards_block_code', $product_sku);
		update_post_meta($product_id, 'product_info_cards_block_title', $product_title);
	
	endwhile;
}