To write a review on the AppExchange page follow the below video
AppExchnage Page URL - https://appexchange.salesforce.com/appxListingDetail?listingId=a0N3A00000EcsAOUAZ
Demo Video for writing an AppExchange review:
https://drive.google.com/file/d/1J9nr5mkdeFUfIH8xJUOZodXZcqnDeYaU/view?usp=drive_link