https://wccftech.com/kb5004296-is-out-for-windows-10-21h1-insiders-only/

Microsoft has released KB5004296 for Windows Insiders in the Release Preview Channel who are currently testing Windows 10 May 2021 Update, version 21H1. Build 19043.1149 (KB5004296) is also available for those running the next version of the OS, version 21H2. The Windows Insider team noted that Insiders in the Beta Channel on 21H1 will not receive today's update.

Microsoft announced the next version of Windows 10 last week with the release of a new v21H2 build. Version 21H2 is the third minor feature update being delivered to the operating system since the pandemic hit the world and pushed Microsoft to change its priorities. The Windows maker has shifted its focus towards developing Windows 11 after having to shelve Windows 10X.