Site Reviews never had a “verify user” feature, I’m not sure what you mean by that.
If you are referring to being able to manually verify a review from the WordPress Admin, that feature was disabled in favor of the new “Request Verification” setting.
Previously you were able to mark a review as “verified” from the WordPress Admin, but that made the verification system pointless.
In WooCommerce, a “verified owner” label is added to the reviewer’s name if they purchased the product that was reviewed. You can’t add this label manually as it defeats the purpose of a “verified owner” label.
When the “Request Verification” setting is enabled, Site Reviews will automatically send a verification email to the person who submitted the review. Once they click the verification link in the email, their review will be marked as verified.
However, if you are still convinced that manual review verification is needed on your website, you can re-enable it will a code snippet as explained on the Site Reviews > Help & Support > Hooks page.