On search result page brand filter is not showing all brands

Hi Vok,

Please try to add the code below in the functions.php file in your child theme, let me know if it works correctly.

add_filter( 'woocommerce_get_filtered_term_product_counts_query', function ( $query ) {
	if ( empty( $_GET['s'] ) || ! apply_filters( 'woodmart_search_by_sku', woodmart_get_opt( 'search_by_sku' ) ) ) {
		return $query;
	}

	global $wpdb;

	$term = woodmart_clean( $_GET['s'] );

	$sku_to_parent_id = $wpdb->get_col( $wpdb->prepare( "SELECT p.post_parent as post_id FROM {$wpdb->posts} as p join {$wpdb->wc_product_meta_lookup} ml on p.ID = ml.product_id and ml.sku LIKE '%%%s%%' where p.post_parent <> 0 group by p.post_parent", $term ) );

	$sku_to_id = $wpdb->get_results( "SELECT product_id FROM {$wpdb->wc_product_meta_lookup} WHERE sku LIKE '%{$term}%';", ARRAY_N );

	$sku_to_id_results = array();
	if ( is_array( $sku_to_id ) ) {
		foreach ( $sku_to_id as $id ) {
			$sku_to_id_results[] = $id[0];
		}
	}

	$search_ids = array_merge( $sku_to_id_results, $sku_to_parent_id );

	if ( $search_ids ) {
		$sql = $wpdb->prepare( "{$wpdb->posts}.ID IN (%s)", implode( ',', $search_ids ) );

		$query['where'] = str_replace( "))", ") OR ({$sql}))", $query['where'] );
	}

	return $query;
});

Regards,