Soldato
The system requirements are here:What CPU is required to run windows 11.
I'm currently on windows 10 and it says I can't upgrade.
Windows 11 Specs and System Requirements | Microsoft
Find an overview of Windows 11 specs and features from Microsoft. Learn about the device specifications, versions and languages available for Windows 11
www.microsoft.com
The list of supported CPUs is here (next to Windows 11 click either amd or intel):
Windows Processor Requirements
This specification details the processors that can be used by OEMs to manufacture Customer Systems that include Windows Products (including Custom Images).
learn.microsoft.com
You can use WhyNotWin11 to view the reasons why your PC doesn't meet the Windows 11 system requirements. There may be multiple reasons.
GitHub - rcmaehl/WhyNotWin11: Detection Script to help identify why your PC is not Windows 11 Release Ready. Now Supporting Update Checks!
Detection Script to help identify why your PC is not Windows 11 Release Ready. Now Supporting Update Checks! - rcmaehl/WhyNotWin11
github.com
It is possible to do a clean install in a way that bypasses some system requirements, if you want info on that just ask, and post your screenshot from WhyNotWin11 so I can see what your issues are.