hello, thank you for your reply.
WooCommerce puts the unpaid order as ‘pending’, that is, it reserves it. Your plugin also sends an e-mail to the customer for the pending order. When the customer clicks the ‘pay with credit card’ button in the mail, he/she should have made the payment with the order number he left, but the order is created as if he has placed a new order. When this is the case, there are pending orders. Actually, the customer came and paid for the order, but a different order number was generated.
If your plugin does not meet this process, it means ‘does not work fully and correctly’. Because the relevant order is not saved, a new order is created.
Thank you again. Good work.