sort order as newest product first option in products in category in category edit does not showing in magento 2.3.2

I want to sort category default sort as newly added SKU at top and oldest at last , this means new to old (SKU) default sorting in frontend of magento 2.

But i am not able to see option => sorting as newest product first option in products in category in category edit
Please help me.

"sorting as newest product first option in products in category in category edit