Hi there, Palletfy Rep.

Thank you for visiting the QuickBooks Community. I'll ensure you can send feedback so your suggestion is forwarded to the Product Development Team. 

QuickBooks is continuously improving the product's features to better meet the needs of our customers. With this, our engineering team is constantly working on new features that may be considered in the future. However, we are unable to provide a specific time frame as to when the option to import purchase orders in bulk will be available.

I suggest going to the Gear icon in QuickBooks Online. From there, you're able to choose Feedback to submit a request about importing purchase orders. Any recommendations are sent to our engineer for consideration in future updates. 

You may refer to this article to see different details on how you can add an accepted purchase order to a transaction for your supplier: Add purchase orders to expenses, bills, or cheques in QuickBooks Online.

Please let me know if you have other concerns about managing your PO and supplier transactions in QBO. I'll gladly help. Take care always.