WordPress doesn't send a notification email when submitting a comment using REST API

Question

When I submit a comment on the WordPress website, it sends me a notification email.
but when I submit a comment through REST API, WordPress doesn't send me a notification email.
What should I do to make WordPress send a notification email when I submit a comment with REST API?

Answer 1

Here's an untested suggestion for the REST API case:

add_action( 'rest_after_insert_comment', 'wp_new_comment_notify_moderator' );

emulating the existing:

add_action( 'comment_post', 'wp_new_comment_notify_moderator' );

Note the different callback inputs between actions and that we use that get_comment() should handle both comment ID or comment object as an input.