Hi James, thanks for reaching out. Did you buy Windows 11 Home as a digital download through your Microsoft account or a boxed copy? If it was digital, the product key is usually tied to your Microsoft account instead of being emailed.
Sign in at account.microsoft.com/services to confirm if the license shows as “Windows 11 Home.” If it’s listed but no key appears, contact Microsoft Store Support through support.microsoft.com/account-billing, choose “Contact us,” and give your order number so they can verify and send your activation details.