The App Preview tool helps you check how your app page would look in App Store after ASO optimization. It will help you to get the most out of app graphics and increase Product Page views and the conversion rate.
Access it under the ASO & Keywords section -> ASO tools, in the left-hand navigation menu:
Preview and test icon, title, subtitle, video, promo text, description — everything you see on the app page. You can test-edit an app page and choose the best option for your ASO optimization. Additionally, you can check this all on different Apple devices: iPhone, Plus, X, SE, and on the search page to make sure your edits look good everywhere:
Make sure you check data in each country that your app supports.