I submitted my application to Cornell on January 1—the deadline was January 2—and I got the credentials to access their portal on January 3.

However, I submitted my applications to other T10 colleges the day after the deadline (12:02, 12:03, etc.) just like you, and I still got the credentials.

Therefore, I think you did everything right. It may just be that they need more time to process the applications, or maybe you got the emails but they are in the spam folder (Gmail often does this with emails from colleges).

So, keep calm, the fact that you submitted a few minutes late has nothing to do with this, otherwise, I (and many others) wouldn’t have gotten the credentials. It’s not your fault. Wait a few more days and if you don’t get any emails, I suggest you reach out to them.