I have a plugin for Request Quote to bypass the payment options, but the quote email templates still use the order_number formatting. I even tried copying and pasting the template code from the default Woocommerce New Order email. The correct quote number will display in one place, but not in the email subject line or the header. You can see an example here https://development.freshbaby.com/wp-content/uploads/Screen-Shot-2022-01-27-at-5.41.27-AM.png