Hey, @TimFreet .
Thank you for reaching out and posting this question!
I’m afraid the Product Reviews app has been sunset and delisted as of Sept 05, 2023. However, if you’re looking for an alternative, then we’ve got a number of third-party recommendations here: Product reviews. If you need to get help with third-party apps, then the app developers are always to assist you. Simply reach out to them using the contact information found at the bottom of their app pages.
That being said, I noticed you’re a new member of our Shopify Community and I’d love to hear more about your business! What kinds of products are you selling? Do you have a marketing plan prepared for your store?