Sorry for a late response. Bulk Ordering will be the best workaround here:
Start by placing orders through Oberlo as usual and wait until the Oberlo Chrome Extension completes the job on AliExpress. On the checkout page, choose "Other Payment Methods" and click on "Confirm & Pay." On the payment page, click "Cancel payment and return to AliExpress".
By doing this, you will create unpaid orders, which can be seen in the "Awaiting payment" section. From there, you will be able to click on the "Pay for all orders" button.
For further explanation, check out the video here: https://monosnap.com/file/J2ZOLBm54wZxlmMjluOMFQaSWdYL19
Let us know how it goes!