Hi, good day!
To help narrow this down
Check your activation status: Go to Settings > System > Activation and confirm whether Windows 11 Pro is activated or still shows Windows 11 Home.
Check your purchase history: Sign in to your Microsoft account at account.microsoft.com/services and review your orders and payment history.
Please try to temporarily disconnect from the Internet
Press Windows key+I to open Settings
Select System > Activation > Change product key > Change
Enter the generic product key below:
VK7JG-NPHTM-C97JM-9MPGT-3V66T
When prompted, Click Activate Product
Make sure to sign in to the Microsoft account you used to purchase the Pro upgrade.
I look forward to your update and am willing to collaborate with you until we resolve the issue. Keep me posted by clicking "Add comment" below.