Force meta data on specific product type

You can try the wp_head hook:

add_action( 'wp_head', 'check_for_enviso_group_ticket' );
function check_for_enviso_group_ticket() {
    if ( is_product() && ( 'enviso_group_ticket' == get_the_terms( get_the_ID(), 'product_type' )[0]->slug ) ) {
        echo '<meta name="robots" content="noindex,nofollow"/>', PHP_EOL;
    }
}

or to not break your site in case the WooCommerce is disabled and the is_product() function isn’t defined:

add_action( 'wp_head', 'check_for_enviso_group_ticket' );
function check_for_enviso_group_ticket() {
    if ( is_singular( array( 'product' ) ) && ( 'enviso_group_ticket' == get_the_terms( get_the_ID(), 'product_type' )[0]->slug ) ) {
        echo '<meta name="robots" content="noindex,nofollow"/>', PHP_EOL;
    }
}