I followed this QA's method to customize the order number on my recent Magento 2.3.1 migration. But when ShipWorks downloads the orders, they still start at
ShipWorks' support team called back and they are keying the
order_id field for order numbers and not
increment_id, which as we all know, is the Order Number in human speak. Once I test the effectiveness of updating the sales_order table's auto_increment primary key, I'll post an answer.