https://wccftech.com/windows-10-2021-build-20257-fe_release-dev-channel/

Image: @WindowsInsider (Twitter)

Microsoft has released a fresh new Windows 10 Insider Preview Build to Insiders in the Dev Channel, who are currently testing features and improvements for next year's feature updates. Windows 10 2021 Insider Preview Build 20257 (from the FE_RELEASE branch) brings a number of improvements and fixes to the Dev Channel Insiders.