Good evening Lindsey and welcome back!
Thank you for reaching out to us.
I would love to help you with this topic.
The short answer is that there is no built-in feature to add extra charges.
However, since we hand over all of the transactional aspect of things to WooCommerce, this means that you can add such fees by using a third-party WooCommerce plugin.
There are quite a few out there, so you will have to do a bit of research.
But here is an example: https://wordpress.org/plugins/woocommerce-product-fees/
Let me know if that helps.
Have a great day!
Geoff B.