cat_is_ancestor_of() for custom taxonomies

I’m trying to use cat_is_ancestor_of() for custom taxonomy categories but it’s not working. Is there any other way to check if a category is child of another?

Use term_is_ancestor_of(). That is the function cat_is_ancestor_of() is calling:

term_is_ancestor_of( $parent, $child, 'taxonomy_name' );