Here is how to get Windows 11 build 22621 if you are still using Windows 10. Step 1: Check if Windows 11 can run on your device. If yes, you can continue with the steps below. Step 2: Join the Beta Channel of the Windows Insider Program. Step 4: Go to Update & Security > Windows Update.

Link: https://www.minitool.com/news/windows-11-build-22621.html