I'm here to share information about creating sales orders in QuickBooks Online (QBO).
Currently, creating sales orders in QBO isn't available. However, you can always record a quote as an alternative.
I can see that the sales order feature is beneficial to you and your business. While this option isn't available, I suggest submitting feedback directly to our product engineers. This way, they can review your request and add it to the future update. To submit feedback, you can go to the Gear icon and select Feedback. Then, enter your suggestion and click Submit.