Can you clarify what you need? Are you just looking to open a parent or child heading, like C-RET or M-RET but at higher/lower level? Because that’s pretty trivial in elisp:

(defun org-insert-child ()
   (interactive)
   (org-insert-heading)
   (org-do-demote))


(defun org-insert-parent ()
   (interactive)
   (org-insert-heading)
   (org-do-promote))

Oh I see. What do you mean by “dark mode is a myth”?

What are you talking about?