WordPress at a glance
filter is not described

user_request_confirmed_email_to filter-hook . WP 4.9.6

Filters the recipient of the data request confirmation notification.

In a Multisite environment, this will default to the email address of the network admin because, by default, single site admins do not have the capabilities required to process requests. Some networks may wish to delegate those capabilities to a single-site admin, or a dedicated person responsible for managing privacy requests.

Usage

add_filter( 'user_request_confirmed_email_to', 'filter_function_name_3652', 10, 2 );
function filter_function_name_3652( $admin_email, $request_data ){
	// filter...

	return $admin_email;
}
$admin_email(string)
The email address of the notification recipient.
$request_data(WP_User_Request)
The request that is initiating the notification.

Where the hook is called

_wp_privacy_send_request_confirmation_notification()
wp-includes/user.php 2919
$admin_email = apply_filters( 'user_request_confirmed_email_to', get_site_option( 'admin_email' ), $request_data );

Where the hook is used (in WP core)

Does not used.