I’d call. I have had a number of situations where I have flagged something for follow up and have totally spaced on it. Your AO might have done that.
I have also been amazed at the number of times my emails have gotten caught in my own outbox or have been caught by a spam filter at the other end. Usually this has been discovered after I’ve been stewing for while.
With a million ways to get in touch with people, there’s a million times more volume to handle and a million more ways for stuff to get missed.
You can also submit the portfolio in whatever way you like and just tell them you’ve done it. Just make sure you send that to the general admissions email as well as your AO.