Magento2 out of stock at last extension will move out of stock products to the end of every product listing/category page. Default Magento show out of stock products at their regular position, no matters whether product is in stock or out of stock. So using this extension you can show the available and unavailable products but the available products will always be shown first. It also works on search result page.
Frontend : https://mdemo1.360websitedemo.com/gear/bags.html
Backend : https://mdemo1.360websitedemo.com/admin?username=outofstocklast
It enables you to add related products, cross-sells, and up-sells
$89.00
Integrates Skynet shipping features like shipment with pickup feature
$185.00
It helps helps to your customers to add product with selected attributes
$45.00
Marcus
A promising module, worth trying.