Hi, I'm John! I will help you with this.
If you purchased Windows 11 Pro from the Microsoft Store and haven’t received an email, your license is most likely a digital license tied directly to your Microsoft account.
In this case, you don’t usually need a product key to install or activate Windows, just make sure you’re signed in with the same account you used to make the purchase.
To activate Windows using your digital license, in the troubleshooter, select Activate Windows, and then select Activate.
I really hope this information is helpful! Let me know if you have any further questions or concerns.
Regards,
John J.D.