The forwarding settings you set in cPanel will be reflected in real time, and emails that are sent to your email address will be forward immediately.
However, please note that it may sometimes be slightly delayed, depending on the congestion status of the mail forwarding on our server or the mail server at the forwarding destination.
*It is also affected by the congestion status of mail, such as the route from the sender mail server, the route to our server, and the route from our server to the destination mail server.