Thank you for posting here in the Community. I can provide some clarification about invoices and sales orders in QuickBooks Desktop.
Currently, the option to invoice all sales orders (shipped) at once is unavailable. You'll need to convert them one by one to separate transactions by customer.
However, if you have multiple sales orders for a specific customer, you can apply them to a single invoice. Here's how:
From the QuickBooks Home screen or the Customer menu, select Create Invoices.
On the Customer: Job drop-down, select a customer or customer job. The available Sales Order window appears.
Choose one or more sales orders that have items you want to include in the invoice.
Make the necessary changes in the Invoice. Note: In the list of items, enter a quantity in the To Invoice (Or Invoiced) column for each item. If you don't want to invoice any of the listed items, enter 0 (zero) as the quantity
Select Save & Close.
I appreciate your input on this feature. As we assess this, I suggest you visit our New Features section to stay updated with all the changes that are being made (see screenshot below).