Hidden Email never linked to my account
I created an account on a site using Apple sign in, and chose to hide my email. I purchased tickets on that site, and never received a confirmation (and therefore the tickets). When I logged in to the site it shows the purchase though.
I went to iCloud hide my email settings and that site is not shown as using a “hide my email” feature. I went to passwords and security to look at apps using my Apple ID, and it isn’t there either. (It’s StubHub, so a reputable site). I was able to see the email Apple assigned to StubHub in my StubHub account, and I sent a test email to it to see if it would be forwarded to me, and it never was.
So now my question is - what happens to emails sent to that address? Is there a way I can access them?
iPhone 13