In order to change the number of products that are being displayed using the Main Query, we need to use a bit of Custom Code.

“Main Query” uses the default WP_Query so, the number of products to be displayed is controlled by WooCommerce.

WooCommerce by default shows only 16 products via Main Query, so you will need to use a bit of custom code to allow a specific number of products while selecting the source as “Main Query”.

Please add the following code in the theme’s functions.php file:

// Change the Number of WooCommerce Products Displayed Per Page
add_filter( 'loop_shop_per_page', function( $per_page ) {
   return 12; // number of products that you want to display per page.
}, 20 );

You can change the number of products to show by changing “12” to the number of products you want to display.