facetwp only products

<?php
/* only filter product queries */

add_filter( 'facetwp_is_main_query', function( $is_main_query, $query ) {
    if ( 'product_query' != $query->get( 'wc_query' ) ) {
        $is_main_query = false;
    }
    return $is_main_query;
}, 10, 2 );