How to Check Windows 11 Build
Select the start button > Settings > System > About
Under Device Specification > System Type, check if you are running a 32bit or 64bit version of Windows.
Under Windows specifications, check which edition and version of Windows your device is running.
Right-Click the start menu and choose Run
In the Run windows, type winver and press OK
The Windows that opens will display the Windows 11 build that is installed