Redirecting to a custom forgot password page

Yep, there’s a hook to change the lost password URL.

I found it by going to this nice page to search all the hooks and filters and selecting ‘Hooks’ and trying ‘lost password’ https://developer.wordpress.org/reference/

An example from here: https://codex.wordpress.org/Plugin_API/Filter_Reference/lostpassword_url

    add_filter( 'lostpassword_url', 'my_lost_password_page', 10, 2 );

    function my_lost_password_page( $lostpassword_url, $redirect ) {
        return home_url( "/yournew/lostpasswordpage.php" );
    }