LayerPlugin.php

<?php

namespace ...;
    
class LayerPlugin
{
    const FILTER_ADDED_KEY = 'tierPriceAdded';

    /**
     * @var \Magento\Framework\Registry
     */
    protected $_coreRegistry;

    /**
     * @var \Magento\Framework\App\Request\Http
     */
    protected $_request;

    /**
     * LayerPlugin constructor.
     * @param \Magento\Framework\Registry $coreRegistry
     */
    public function __construct(
        \Magento\Framework\Registry $coreRegistry,
        \Magento\Framework\App\Request\Http $request
    )
    {
        $this->_coreRegistry = $coreRegistry;
        $this->_request = $request;
    }

    /**
     * @param \Magento\Catalog\Model\Layer $layer
     * @param $collection
     * @return mixed
     */
    public function afterGetProductCollection(\Magento\Catalog\Model\Layer $layer, $collection)
    {
        if ($this->_filterAlreadyAdded()) {
            return $collection;
        }

        if ($this->_request->getModuleName() == 'catalogsearch') {
            return $collection;
        }

        $tierPriceSelect = new \Zend_Db_Expr("
            (SELECT entity_id, value_id FROM catalog_product_entity_tier_price ip)
        ");

        $collection->getSelect()->joinLeft(['pr' => 'catalog_product_relation'], 'pr.parent_id = e.entity_id', []);
        $collection->getSelect()->joinLeft(['tierprices' => $tierPriceSelect], 'e.entity_id = tierprices.entity_id OR tierprices.entity_id = pr.child_id', []);
        $collection->getSelect()->group('e.entity_id');
        $collection->getSelect()->having("(e.type_id IN ('configurable', 'bundle') AND count(tierprices.entity_id) = count(pr.child_id)) OR (e.type_id NOT IN ('configurable', 'bundle')) AND tier_price IS NOT NULL");

        $this->_rememberFilter();

        return $collection;

    }

    /**
     *
     */
    protected function _rememberFilter()
    {
        $this->_coreRegistry->register(self::FILTER_ADDED_KEY, true);
    }

    /**
     * @return mixed
     */
    protected
    function _filterAlreadyAdded()
    {
        return $this->_coreRegistry->registry(self::FILTER_ADDED_KEY);
    }
}