Reply To: H1-5 to div

1) Try to add the following PHP code snippet to the child theme functions.php file to change the product title tag

function woocommerce_template_loop_product_title() {
	echo '<h3 class="product-title"><a href="' . get_the_permalink() . '">' . get_the_title() . '</a></h3>';
}

2) As for the second screenshot, this is a default element of the plugin WPB and you can not change the tag without modifying the plugin files.

Kind Regards
XTemos Studio