BFEs are typically mailed from WP on the Thursday or Friday the week an offer is given - typically Tuesdays. If a candidate is given an offer, or when they are released by Admissions (sometimes Tuesdays or Wednesdays) it shows up immediately in the Admissions system, but not viewable by the candidate until 72 hours later. That gives nominating authorities time to contact candidates directly. Check your portal Fridays or Saturdays.