Magento – Magento 2.1 : getLoadedProductCollection() always returns all products

I found the answer here, in another question. To clarify further; I went with the first approach, created a simple module and used the code from the said answer in my view/frontend/templates/subcategories.phtml Then I use a custom layout update XML in the adminpanel for the categories where I want the code to show.

It seems you have to set pager and sorting in your custom phtml file.

I have followed below steps pr add pagination and sorting.

In your block file add below code for add pagination:

public function __construct(
    \Magento\Catalog\Block\Product\Context $context,
    \Magento\Catalog\Model\ProductFactory $productFactory,
    \Magento\Framework\Url\Helper\Data $urlHelper,
    array $data = []
) {
    $this->_productFactory = $productFactory;
    $this->urlHelper = $urlHelper;
    parent::__construct($context, $data);

    // Get your custom collection here

    $collection = $this->getCustomCollection();

    $this->setCollection($collection);
}

public function _prepareLayout()
{

    parent::_prepareLayout();
    if ($this->getCollection()) {

        // create pager block for collection 

        $toolbar = $this->getToolbarBlock();

        $pager = $this->getLayout()->createBlock(
            'Magento\Theme\Block\Html\Pager', 'list.pager'
        )->setCollection(
            $this->getCollection() // assign collection to pager
        );
        $toolbar->setChild('product_list_toolbar_pager', $pager); // set pager block in layout
        // called prepare sortable parameters
        $collection = $this->getCollection();

        // use sortable parameters
        $orders = $this->getAvailableOrders();

        if ($orders) {
            $toolbar->setAvailableOrders($orders);
        }
        $sort = $this->getSortBy();
        if ($sort) {
            $toolbar->setDefaultOrder($sort);
        }
        $dir = $this->getDefaultDirection();
        if ($dir) {
            $toolbar->setDefaultDirection($dir);
        }
        $modes = $this->getModes();
        if ($modes) {
            $toolbar->setModes($modes);
        }
        $toolbar->setCollection($collection);

        $this->setChild('toolbar', $toolbar);
        $this->getCollection()->load();
    }

    return $this;
}

public function getToolbarHtml()
{
    return $this->getChildHtml('toolbar');
}

public function getToolbarBlock()
{
    $blockName = $this->getToolbarBlockName();
    if ($blockName) {
        $block = $this->getLayout()->getBlock($blockName);
        if ($block) {
            return $block;
        }
    }
    $block = $this->getLayout()->createBlock($this->_defaultToolbarBlock, uniqid(microtime()));

    return $block;
}

public function getMode()
{
    return $this->getChildBlock('toolbar')->getCurrentMode();
}

Also define below property:

protected $_defaultToolbarBlock = 'Magento\Catalog\Block\Product\ProductList\Toolbar';

In phtml file add below code before and after listing:

<?php echo $block->getToolbarHtml() ?>