Yes, the admin can manually add the Magento store orders to the QuickBooks Queue in Magento 2 Quickbooks Desktop Connector module.
The admin will click on the “Add Orders in QuickBooks Queue for Export” button. This will export the orders to the QuickBooks queue from your Magento store. And will be created in QuickBooks when you connect your QuickBooks with web connector application.
If you have any issue, please feel free to add a ticket and let us know your views at https://webkul.uvdesk.com