Snippet to hide products in specified category from WooCommerce catalogue

hide-products-from-catalogue.php

<?php

add_action( 'woocommerce_product_query', 'custom_pre_get_posts_query' );
function custom_pre_get_posts_query( $q ) {
    $tax_query = (array) $q->get( 'tax_query' );
    
    $tax_query[] = array(
    'taxonomy' => 'product_cat',
    'field' => 'slug',
    'terms' => array( 'category'), // replace with your category slug
    'operator' => 'NOT IN'
    );
    
    $q->set( 'tax_query', $tax_query );
} 

?>