Ticket #40477: 40477.2.patch

src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php

@@ -510 +510 @@
                         if ( is_wp_error( $user_id ) ) {
                                 return $user_id;
                         }
+
+                        // Trigger admin and user notifications for the new user.
+                        wp_send_new_user_notifications( $user_id );
                 }
 
                 $user = get_user_by( 'id', $user_id );