Starting from extension version 1.17.3 there's a possibility to use new fields for import:
— ‘sku’
— ‘rating_code’
— ‘option_values’
The functionality is available in the Import & Export for Advanced Product Reviews add-on and Advanced Product Reviews Premium as a part of an active product subscription or support subscription. You can find the 'amasty/module-reviews-import-export-additional-fields' package for installing in composer suggest.
The old options (available in previous versions) also remain functional: entity_pk_value, rating_ids, and option_ids.
For a correct import, one of the following pairs must be filled in:
rating_ids or rating_codes
option_ids or option_values (since the information in both rating_ columns duplicates each other, as does the information in both option_ columns). If rating_ids and rating_codes, or option_ids and option_values are provided simultaneously, they must refer to the same review.
You may download a sample of the file right from the admin panel: