Configured Apple Sign Relay but not receiving emails

I'm following the steps outlined to be able to email users that have used Apple Sign-in that is listed here and I have a green check for SPF status. I used my email <my_email_here>@gmail.com, but when I try to send an email from the email address configured to the private relay email I don't see my test email coming through.

I also tried sending an email from a non configured email and I don't back any sort of error message, not sure if I should though.

Is there a delay in how quickly the email is received?