Google's gotten us used to releasing the first Developer Preview of a new Android version in March, but this time around the company has been faster. Android 11/R is now out in the form of Developer Preview 1. As usual, this is not intended to be used by regular consumers because it's very much a first unpolished draft of what will end up being Android 11 later this year. Still, the release is useful because we get a glimpse of the changes headed our way when Android 11 becomes final. Note that this may not be the full list, as Google has the habit of unveiling some more new features...
Source: https://www.gsmarena.com/android_11_is_out_in_developer_preview_form_with_many_changes-news-41612.php