https://wccftech.com/windows-10-21h1-build-19043-1147-is-out-for-release-preview-channel/ > Microsoft is on a release spree today. After releasing a new build for Insiders testing Windows 11 and introducing the next feature update of Windows 10 (build also out for Insiders), the company is also releasing a build for the Release Preview Channel Insiders who are running the latest Windows 10 May 2021 Update, version 21H1. > Beta Channel devices running version 21H1 aren't getting this build today, but the Windows Insider team said they will get these Preview Builds soon.