Hi @manioums
I believe ACF already uses the “comment_form_after_fields” to show the form. The problem is, “comment_form_after_fields” fires after the comment fields in the comment form, excluding the textarea. This page should give you more idea about it: https://developer.wordpress.org/reference/hooks/comment_form_after_fields/.
The easiest way to do it would be using jQuery to move it.
I hope this helps.
