Hello,

1. Firstly, create an HTML Block in Dashboard -> HTML Blocks with WPBakery and add any content you need. Copy this block’s shortcode.

2. Follow this article and put the code for adding new tab to the functions.php file in your child theme https://docs.woocommerce.com/document/editing-product-data-tabs/#section-5

3. Instead of these lines

	echo '<h2>New Product Tab</h2>';
	echo '<p>Here\'s your new product tab.</p>';

put your block’s shortcode like this

echo do_shortcode('[block id=""]');

Regards