We are using the WooCommerce Subscriptions. The people from the plugin told us that we would need to use another plugin to add this function, as the WooCommerce Subscriptions uses the email templates from WooCommerce.
I assume that WC does not include email templates for subscriptions.
They suggested this one: https://woocommerce.com/products/enhancer-for-woocommerce-subscriptions/
Is there another way to go about this?