get taxonomy list in a page in the wordpress

The functions such as get_categories are unique to the post category taxonomy. “Category” is a taxonomy term. If you register your own taxonomies, you need to use get_terms which has similar parameters to your get_categories function.

$terms = get_terms(array(
   'hide_empty' => false,
   'orderby'    => 'name',
   'order'      => 'ASC',
   'taxonomy'   => 'your-taxonomy' 
));