test_9638.php

<?php
// Drop this file into wp-content/mu-plugins.

// Test 1 - Remove Feedback callbacks from data export/erasure tools.
// Uncomment the next two lines to test.
//add_filter( 'wp_privacy_personal_data_exporters', 'remove_feedback_callback', 20 );
//add_filter( 'wp_privacy_personal_data_erasers', 'remove_feedback_callback', 20 );

function remove_feedback_callback( $callbacks ) {
	unset( $callbacks['jetpack-feedback'] );

	return $callbacks;
}

// Test 2 - Prevent erasure of a feedback post.
// Uncomment the next line to test.
//add_filter( 'grunion_contact_form_delete_feedback_post', 'prevent_feedback_post_erasure', 10, 2 );

function prevent_feedback_post_erasure( $prevention_message, $post_id ) {
	$prevention_message = sprintf(
		'Feedback with ID %d could not be erased because reasons.',
		$post_id
	);

	return $prevention_message;
}