There is a 14day period after your guests check out.
case 1: if within that period, you both post a review, they will get publihed after the second party writes their review.f it is the guests review that gets posted, the host has the option to answer to that review and the answer will appear under the guest's review on the hosts's listing's reviews.
case 2: if one of the parties posts a review and the second party does not, the single review will be published after the 14day period. If it is the guests review that gets posted, the host has the option to answer to that review and the answer will appear under the guest's review on the hosts's listing's reviews.
case 3: if none of the parties posts a review, nothing gets published 😮
my two cents:)