https://www.bleepingcomputer.com/news/microsoft/microsoft-is-preparing-to-release-the-windows-10-may-2021-update/

Microsoft has announced that the Windows May 10th 2021 Update (21H1) is complete and being prepared for release.

Brandon LeBlanc, Senior Program Manager for the Windows Insider program, states that Microsoft believes build 19043.928 is the final build for the May 2021 Update.