Basic analytics allows you to filter metrics by dates, products, and countries. As of now, it only works for iOS after uploading App Store Connect credentials. To get more insights for both iOS and Android, install SDK, and use Advanced Analytics.
Since Basic Analytics is calculated based on App Store Connect Sales reports which do not provide reliable user-purchase relation data, Subscription conversion rate metric can show inaccurate results if a short period of time is chosen as a date filter; please consider choosing a longer period (like a year), which results in more reliable estimation.
Basic analytics data refreshed daily around 4 pm UTC and shows the data for the previous day. These are restrictions of App Store Connect.