Order number and invoice number

-- url of the page with the problem -- : www.scramble.nl
-- HikaShop version -- : 5.1.1
-- Joomla version -- : 5.2.1
-- PHP version -- : 8.1
-- Browser(s) name and version -- : Edge 130.0.2849.80

I have created an order ID in this format: {id size="5"}/{date format="d/m/y"}
This works great.
But is there a way to have the invoice number exactly the same as the order number? The invoice number is only created when the order goes to confirmed. With an electronic payment, this would be immediate. But we also allow bank transfers so then the status of the order will be changed later and another date will be created as invoice number.

I inserted {order_number} and created a new order, but the invoice number stays empty.
I don't think that your second solution will do the trick. It will with an electronic payment. But if you have a banktransfer then the order will only be confirmed a few days later and so the order_id will probably be right, but not the date. It will take the date of confirmation, not the date the order was placed. Or do I miss something here?