WooCommerce: Change number of products that are displayed per page (shop page)

Add this code snippet to your favorite code operator, and change $count = 8 according to your settings

add_filter( 'loop_shop_per_page', 'update_shops_per_page', 20 );

function update_shops_per_page( $count ) {
 $count = 8;
  return $count;
}