Hi,
First of all, download ShowKeyPlus to note down the key you are currently using.
https://apps.microsoft.com/detail/9pkvzcprx9nv?hl=pt-BR&gl=BR
After noting it down, you must disconnect your PC from the internet.
Open the Start menu > Settings > System > Activation > Change product key
VK7JG-NPHTM-C97JM-9MPGT-3V66T
Continue, it will ask if you are changing from the Home edition to the Pro edition, and you wait for it to finish.
After that, you will connect to the internet and use the Microsoft account you used to purchase the Windows 11 Pro upgrade.
It will reactivate itself after a while, or you can use the troubleshooter in the Start menu > Settings > System > Activation > Troubleshoot.
Thanks