Split quote item for Backorder quantity

[m-canziani]

I am trying to use your Module to separate the products that are ordered in backorders mode.
I ask you if you know the most correct method to separate the same Item Quote into two different orders, with the quantities divided by backorders.
Ex:
Product 1 -> Stock = Qty: 3, Min_Qty: -10(Out-of-Stock Threshold)
Custumer Cart: Product 1 -> Qty: 8
So 3 real Stock and 5 Backorders

i want 2 orders:
Order 1: Product 1 -> Qty: 3
Order 2: Product 1 -> Qty: 5

Now i've modified (in Magestat/SplitOrder/Model/ExtensionAttributes.php) your function quantityAndStockStatus
if ($this->helperData->getBackorder() && ($attributes->getStockItem()->getQty() - $item->getQty() < 0) ) { return 'out'; }
So i can get if Quote Item have Backorders.
Then in normalizeQuote function:

        if($attribute === 'out'){
            $qtyIn = $product->getExtensionAttributes()->getStockItem()->getQty();
            $qtyOut = $item->getQty() - $qtyIn;

            $itemCopy = clone $item;

            $groups["in"][] = $item->setQty($qtyIn);
            $this->writeLog("getQty() before > " . $item->getQty() );
            $groups[$attribute][] = $itemCopy->setQty($qtyOut);
            $this->writeLog("itemCopy() after > " . $itemCopy->getQty() );
            $item->save();
            $itemCopy->save();
        } else {
            $groups[$attribute][] = $item;
        }

Additional context
Now the order is split correctly but tax_amount for the 2 Quotes isn't changed and the Stock statud of Product 1 is set -8 quantity so the stockInventory decurted 3 more quantity than the orders placed.

I did a lot of research and found nothing about dividing the same Item into two orders.
Have you any suggestion or feature to implement?

[williankeller]

Thank you for opening this issue. We will align to move this change to our next release.

[jg-development]

We are in need of this feature too ... are there any updates for the new version 1.1.0?
Greetings