BankID - Age Limit on all Products

functions.php

<?php
/**
* @snippet WooCommerce - BankID plugin by Redlight Media - Add Age control on all products
* @author Redlight Media AB / Christopher Hedqvist
* @compatible WooCommerce 4.2.0
*/
add_action( 'woocommerce_add_cart_item_data', 'limit_all_products', 10, 3 );
function limit_all_products( $cart_item_data, $product_id, $variation_id ) {	
		$cart_item_data['is_age_verification_required'] = 'yes';
		return $cart_item_data;
}