Query in a Hierarchical Custom Post Type for Children vs Siblings

get_pages() works with other post types just fine, you only need to pass post_type you want as part of argument (also I recommend to stick with array notation).

$children = get_pages( array( 'child_of' => $post->ID, 'post_type' => 'your_post_type', ) );

Related Posts:

  1. How To Limit Hierarchical Pages Depth (For Custom Post Types) To Children Only
  2. Automatically create child pages when saving a (parent) page
  3. Display a list of child posts on parent posts of a custom post type
  4. 404 on child page when parent page slug is identical to custom post type
  5. Create child page within custom post type
  6. Custom Post Type Permalink For Parent/Child, 404 Page Not Found Error
  7. Display posts of custom type in hierarchical order
  8. Child page in custom post throws 404 page not found
  9. Custom post type hierarchical permalinks not behaving as expected for parent/child pages
  10. Remove custom post type slug not working for child pages
  11. Share parent path between Custom Post Types and Pages?
  12. Page as a child of a Custom Post Type
  13. Can I make WordPress use a custom template for a child page
  14. Custom rewrite rule for hierarchical custom post type
  15. List children on child post
  16. child of post type (custom)
  17. Child post with numeric only slug keeps redirecting to parent
  18. Next and Previous Posts of Same Parent
  19. Display Child Pages of Custom Post Type Parent Page
  20. Versioned Custom Post Type (Not the same as revisions)
  21. Custom post Type, child of a Page?
  22. What code should I use to display children of a custom post?
  23. Removed custom post type slug but not working for child pages
  24. List of child custom post types lists all custom post types
  25. Redirect to first child on Custom Post Type (without template)
  26. Query to get child pages of current page and display it in action hook
  27. If/Else child list for Custom Post Type single template within loop?
  28. Migrate Custom Post Type with Custom Fields data and parent child order
  29. How do I find out which (page) template file my custom child post is looking for?
  30. How to use POST method using custom wordpress button?
  31. Standard Page Child of CPT Not Found (404)
  32. Display a list of sub-pages of Custom Post Type Parent Page
  33. I have a problem with displaying children pages of custom post type
  34. WordPress custom post type and page
  35. Child Theme problems
  36. Custom post type child page 404
  37. Custom Post Type Child Pages
  38. How can I give WordPress child custom post type the same title and slug as its parent?
  39. New post status for custom post type
  40. Adding Custom Post Type Counts to the Dashboard
  41. How can I filter posts by post_parent in the admin?
  42. Get Custom Taxonomy ID within loop
  43. Rewriting ‘rewrite’ slug for custom post type used by plugin
  44. Using Templates with Custom Post Type UI
  45. WordPress Custom Post Type Admin Page really slow
  46. How to setup a Custom Taxonomy Term template
  47. Creating a gallery of featured images from custom post type
  48. Retrieve a specific field from taxonomy term through advanced custom fields [closed]
  49. Customize Search Results for Custom Post Type
  50. RSS feed for dynamic set of custom taxonomies terms
  51. Related links – from other sites
  52. Showing Custom Content in a Nav Dropdown
  53. Display custom post type category taxonomy
  54. Are there sub-systems in WordPress that would employ data structures beyond CPT that a `get_posts` won’t be able to catch?
  55. ACF simple text field value not showing
  56. List Post Title by Last Word Then Second Last
  57. Query custom post type with tags
  58. Display post as term id
  59. WordPress custom post type permalink rewrite shows page not found
  60. Create a Dropdown from Custom Post Type
  61. Custom post type conditional in loop
  62. Showing specific post in order of array wp_query
  63. Why cant I add a custom post type to a custom taxonomy?
  64. the_post_thumbnail call removing li in code
  65. How to display custom post type tags?
  66. Featured image size in column
  67. Submitting Custom Post Types with custom fields from Front-end form
  68. Custom WP_Query always respond with 200 status even when no entry
  69. Page Template Dropdown For Custom Post Types
  70. Get_the_terms restrict output
  71. Can I query posts by taxonomy conditionally based on post type?
  72. Include custom post type custom taxonomies in Categories widget
  73. Break up posts per page in two sections
  74. post_content is stripping HTML when adding a new post? [closed]
  75. Querying a custom post type, but not show duplicates
  76. Dynamic category name in query post
  77. Two queries – one with checkbox ticked, one without – comparing meta_query
  78. Ignores post_type when no results
  79. Can I decide what categories show on my posts page?
  80. Link custom post type to users membership
  81. WordPress – display relationship between blog posts and custom posts
  82. Multiple Loops In Tabs Only Displaying First Loop
  83. WP_Query to display number of custom post type filtered (order by) taxonomy
  84. Display post in sequence from different custom post_type
  85. Sort loop by custom field from different post type
  86. Custom post meta box as a sub form
  87. Custom meta box data not saving
  88. Custom post type rewrite and wp_pagenavi interfering with each other
  89. Custom meta-box for all custom post types
  90. Retrieve a specific category of posts when using a custom post type
  91. General question about Parent and Child Post type relationships
  92. WordPress Load more posts by ajax not working
  93. Multiple while loops not functioning [closed]
  94. Listing all custom post types using a specific term on the said term’s template page, in groups
  95. How to write an if statement which reads: ‘if is this custom post type or a child of it do the following’?
  96. taxonomies or categories w/custom post
  97. Require Custom Taxonomy for Custom Type
  98. Get post from custom post type that title is like custom string [closed]
  99. Why isn’t page attributes dropdown not showing up in a custom post type
  100. Query order by a numeric ACF field