AI generative review summary

Dear Sir/Madam,

I am very interested in your website. But I have some questions about the website, hoping you can answer them. Here are the points:

1. The news (https://www.aboutamazon.com/news/amazon-ai/amazon-improves-customer-reviews-with-generative-ai) said you provide a short paragraph right on the product detail page that highlights the product features and customer sentiment frequently mentioned across written reviews. I want to know how many reviews you used to generate the New AI-generated customer review highlights. I am also curious about when and how you update the summary over time.
2. Besides, we are also confused about the category, which product category does this feature apply to now? And for all the products in this category?
3. The news also says that this feature is available to a subset of mobile shoppers in the U.S., what kind of shoppers can be available and only for mobile users? In all U.S. or just some popular cities? Can shoppers in the U.S. see this feature on Amazon's PC page?

I'd really like to know more details about this feature and hope you can answer my questions. If you have any questions, feel free to reach out. Thanks!