1
Your hardware is all indicated as Windows 11 compatible, are you offered the free upgrade to Windows 11 in the Updates section of the Settings app, and if so ,is that failing, and what error is indicated.
2
With regards to Windows Activation:
A
Please provide a screenshot of the WIndows licence error you are seeing.
B
Click your Start Button, type cmd then right click Command Prompt and choose 'Run as Administrator'
Run or paste this command and hit Enter:
slmgr.vbs /dlv
Please post a screenshot of the resulting dialog