Hi there @Monica2375, I was able to find this piece of information in the Airbnb Help Center
"After your stay, Airbnb will send an email asking you to leave a review for your most recent Host or guest. Within the email, there will be a link that takes you directly to the Reviews page so you can share how your reservation went with other community members.
If you can’t find the link in your email, you can also write a review directly on Airbnb – if you’re a guest, go to your Trips page, and if you’re a Host, visit the Reservation section of your Today tab. You’ll also be able to leave a review directly from your Inbox."
I hope this helps!
Quincy