MAGENTO 2 AUTO INVOICE AND SHIPMENT
https://www.cynoinfotech.com/product/auto-invoice-and-shipment-magento-2-extension/
This module will help you in sending default invoice emails to both - admins and customers through its in built functionality. And, such emails will be done right after the completion of order and payment. That’s how every buyer stays updated through this particular plugin. Cynoinfotech is a trusted web development company in India that will help you in installing Magento 2 auto invoice and shipment extension. Save time on manual processing and speed up the invoicing and shipment process instantly.