Currently we do NOT support copy OR transfer existing reviews from product A to product B (in the same OR different store) DIRECTLY from within Ali Reviews.
HOWEVER, with the new function, Import reviews from CSV File, in the latest update version 5.2, you can achieve it if reviews from product A were prepared, OR could be exported to a CSV file previously.
This will help to:
Make sure that all reviews will be reviewed carefully by yourself in order to avoid unexpected badly feedback that could affect to your store's revenue.
RE-USE reviews in the future for new stores/products/RE-IMPORT purpose in case you need it.
For more detail, how to import reviews to a product from CSV file, please check here.
We hope this might be helpful for you.
Should you need further support, please feel free to contact us via live chat or email us at email@example.com