Oh god yes I do! Sorry!
I’ve spent a few hours on it today and I got the value of the dropdown to be the product code (at least i think it’s the same as poductId) but for some reason it didn’t work as I wanted it to.
I even tried adding a review without using the productid at all(just product name) and then manually assigning it to a product in the database collection (using the product reference field) but that didn’t work (the review would not show up on the product’s page).