Magento 2.3.2 sort collection by stock availability

Question

I want every collection with 0 stock to get moved to the bottom (last position)

I've tried using a plugin. My di.xml

<type name="Magento\Catalog\Model\Layer">
        <plugin name="Vendor_Module_Plugin"
                type="Vendor\Module\Plugin\CollectionPlugin"
                sortOrder="10"
                disabled="false"/>
</type>

My file name CollectionPlugin.php

class CollectionPlugin
{
   public function aroundgetProductCollection(
        Layer $subject,
        callable $proceed
    ) {
        $collection = $proceed();
        $collection->setOrder('is_salable DESC');
        return $collection;
    }
}

For some reason, It removes every product from the collection.

Answer 1

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