You’re adding another form to the page, hence why you’re having issues. You just need to amend the existing woo review form
If you want to add the fields to the existing Woo Reviews form, when you create the ACF fields , under Rules set the field group to Comments (under the form heading) is equal to then select Product.
Testing this on a fresh install of WP, Woo and the 21 theme, the new fields show on the product review forms.
