App reviews/star ratings on the App Store are open to anyone with an Apple ID. You can only post reviews and star ratings for downloaded apps that are published in your country/region's store, but important information for other users to compare apps. be the source.
You cannot change the star rating given to an app on the "Recommended" screen. Display the page of the target app in the App Store app and tap the number of stars there to change it.
If you change the review content or star rating, it will take several hours to several days to be reflected on the app page of the App Store, but it will be reflected immediately on the "Recommended" screen. Although there is no function to edit the star rating/review content, it should be useful when you want to check the content and delete it all at once.