Hello,
If Win11 is not offered to you, run the PC health check app, see if your device is meeting the requirements for Win11: https://support.microsoft.com/en-us/windows/how-to-use-the-pc-health-check-app-9c8abd9b-03ba-4e67-81ef-36f37caa7844
If it does, you can go here: https://www.microsoft.com/en-us/software-download/windows11
Download and run the installation assistant tool to upgrade to Win11.