https://wccftech.com/download-android-11-developer-preview-4-now-available-beta-1-release-date-revealed/

Google has just released the Android 11 Developer Preview 4. Keep in mind that Google released the first one back in February, followed by a few more releases. For those who do not know, after the developer previews, Google was set to release the Android 11 Beta at the I/O event but due to the cancellation of the event because of the global health crises, the overall release window has been impacted.

In order to make up for the delay, Google has instead released the Android 11 Developer Preview 4 and announced that the first beta will be released on 3rd June, later this year. This means that the release timeline of the Android 11 has been changed too.