If you upgrade from Windows 11 Home to Pro , please follow these steps :
1:Select Start > Settings > System > Activation.
2:Under Upgrade your edition of Windows, select Open Store
3:Select “I have a Windows 10/11 Pro Product Key”, then input the product key
4:   If you have any error warning , please reboot your PC and try it again
if you need a windows 11 pro key, you can get it from www.keyingo.com