Nintendo recently implemented support for customer reviews for Nintendo Switch games, including Pokkén Tournament DX. However, this option has since been pulled as the publisher is still evaluating the feature. Nintendo’s official statement on the matter is as follows:
Customer reviews have been taken offline as we evaluate this feature and its functionality. We currently have no estimated date on when an update will be provided. We appreciate the positive response and thank the reviewers who provided such thoughtful commentary on the games.
Nintendo.com recently offered a trial customer review feature to let users share feedback about Nintendo Switch games on our website. The response has been positive, and Nintendo appreciates the time and effort that reviewers put into their thoughtful commentary on the games. Nintendo has removed this feature as we evaluate the future of the ratings functionality on Nintendo.com. We have no estimate on when an update will be provided on the status of this initiative, but we appreciate the enthusiasm shown for the trial.
Source: Reddit.com and Polygon