Auto Invoice and Shipment Magento 2 Extension - Cynoinfotech
https://www.cynoinfotech.com/product/auto-invoice-and-shipment-magento-2-extension/
This process becomes extremely efficient and powerful when your store has a number of products to process. Auto Invoice and Shipment Magento 2 Extension by Cynoinfotech makes the order processing process fast and efficient by automatically generating invoices and shipments after orders and payments are completed.