No. Joining the Insider Program does not grant you a product key. You must already have a valid Windows license on your device. The program is free to join, but it is not a way to obtain a free Windows license.
If your motherboard has a digital license for Windows 11 Home, installing the Pro Insider Preview will give you an unactivated Pro experience. You cannot upgrade your edition type without paying the upgrade fee in the Settings app. windows 11 pro insider preview activation key
: Your Microsoft Account (MSA) is linked to a valid license for Windows 11 Pro. When you sign in to the Insider build with that account, it activates automatically. Standard Activation Steps it activates automatically. Standard Activation Steps