Currently, takeaway should active when checkout by manual switch on. If you want it default switch on, you can use this filter code to yourtheme/functions.php or any snippets code plugin:

function custom_pos_checkout_takeaway_default($session_response_data){
    $session_response_data['setting']['pos_checkout_takeaway_default'] =  'yes';
    return $session_response_data;
}
add_filter('op_get_login_cashdrawer_data','custom_pos_checkout_takeaway_default',11,1);