I have created the custom taxonomy for categories. I want to list the child categories lists of current parent category in child page.

$cateID = get_queried_object_id();    
$args = array(
  'format' => 'name',
  'separator' => ' ',
  'link' => false,
  'inclusive' => true
);
$checkparent =  get_term_parents_list( 
 $cateID, 'my-taxonamy' , $args
); 

I have tried the above code. But the code returns the parent category name/link. Any way to get the parent category id in child category page? Any methods or hooks are there in wordpress for getting the parent category id?

Example case:

1. Parent category1
   • Child category1
   • Child category1
   • Child category3
2. Parent category1
   • Child category1
   • Child category1

If i am in child category1 page, want to list the below categories.

• Child category1
• Child category1
• Child category3

Problem:
I cannot able to get the parent category id from the child category.

Thanks in advance 😉