Hi @Theresa275
when guests leave a review you will be emailed by AirBnb and get a notification on the AirBnb dashboard.
A review can only be given within 14 days after the stay. If guests already gave you a review, but you didn't give to them, and the 14 days are not over yet, you won't be able to see their review.
If both, guest and host have given a review before the 14 days are over, both results can be seen immediately.
So, maybe it's just a private message from them.