Unable to forward Hide My Email

Contacted Chat support and they were ZERO help. I setup my login for an app using my Apple account which triggered an @privaterelay.appleid.com Hide My email address. The app is sending 2FA codes to that address but the emails aren't coming through. To make sure it isn't the app provider, I tried sending an email to that address as well and it didn't come through either. How is it that there is not 24/7 support for something like this? Apple says all of its systems are working properly, but clearly they aren't.

[Re-Titled by Moderator]