we have upgraded a very buggy Magento 2.1.9 website to Magento 2.4.1 and are about to launch the new website. It's taken a few months to upgrade and build a new theme. but obviously the orders are now out of synch.
How can I migrate the orders from the 2.1.9 live site to the new 2.4.1 development site?
(I did look at the Aitoc import/export order extension, but the tech support guys were awful and after a month of them ignoring an installation issue, I have to start from scratch again).