WordPress at a glance
filter is not described

user_request_action_confirmed_message filter-hook . WP 4.9.6

Filters the message displayed to a user when they confirm a data request.

Usage

add_filter( 'user_request_action_confirmed_message', 'filter_function_name_4109', 10, 2 );
function filter_function_name_4109( $message, $request_id ){
	// filter...

	return $message;
}
$message(string)
The message to the user.
$request_id(int)
The ID of the request being confirmed.

Where the hook is called

_wp_privacy_account_request_confirmed_message()
wp-includes/user.php 3189
$message = apply_filters( 'user_request_action_confirmed_message', $message, $request_id );

Where the hook is used (in WP core)

Does not used.