@Susan375
If you have not left a review you will receive an email if your guest has already left one, but the detail will be blocked until you leave a review. Once both of you leave reviews, both will be published. If only one of you leaves a review, then it will not be published for 14 days - during which the other party still has a change to submit a review.
Your guest will receive an email from AirBnB inviting them to review their experience - and it will also appear in their notifiation centre on their AirBnB profile. Same for you..