From where category id is coming

[sumeetmagento]

File name - app/code/Simi/Simiconnector/Model/ResourceModel/Productlist/ProductlistCollection.php

File function -
$collection = $simiObjectManager->create('Magento\Catalog\Model\Product')->getCollection()
->addAttributeToSelect($simiObjectManager->get('Magento\Catalog\Model\Config')
->getProductAttributes())
->addMinimalPrice()
->addFinalPrice()
->addTaxPercents()
->addUrlRewrite();

when we print SQL query then category_id is coming from where it is coming ?

Debugging that part -
echo "
-----
";
echo $collection->getSelect()->__toString();
echo "
-----
";
echo "in zero"; die;

this is the SQL query -

 -----
SELECT `e`.*, `price_index`.`price`, `price_index`.`tax_class_id`, `price_index`.`final_price`, IF(price_index.tier_price IS NOT NULL, LEAST(price_index.min_price, price_index.tier_price), price_index.min_price) AS `minimal_price`, `price_index`.`min_price`, `price_index`.`max_price`, `price_index`.`tier_price`, `cat_index`.`position` AS `cat_index_position` FROM `catalog_product_entity` AS `e` INNER JOIN `catalog_product_index_price` AS `price_index` ON price_index.entity_id = e.entity_id AND price_index.customer_group_id = 0 AND price_index.website_id = '1' INNER JOIN `catalog_category_product_index_store2` AS `cat_index` ON cat_index.product_id=e.entity_id AND cat_index.store_id=2 AND **cat_index.category_id=29** WHERE (e.created_in <= '1677618002') AND (e.updated_in > '1677618002')
-----
in zero 

anyone is there that where cat_index.category_id=29 is coming from ?