I cannot display custom posts in custom taxonomy

try this code :

function custom_taxonomy_m_product_category() {
        register_taxonomy('m_product_category', ['m_product'], [
            'hierarchical' => true,
            'labels' => $labels,
            'show_ui' => true,
            'show_admin_column' => true,
            'exclude_from_search' => **false**,
            'query_var' => true,
            'public' => true,
            'hierarchical' => true,
            'rewrite' => ['slug' => 'cat-slug', 'with_front' => true ],
        ]);
    }