Use this email address and any random password:
Enter [email protected] as the email address and click Next when Windows 11 setup prompts you to log into your Microsoft account.
Then, in the Enter password field, enter any password and select the Sign in button. The message “Oops, something went wrong” will appear.
Select the Next button and the “Who’s going to use this device?” phase will appear. Now, just enter a local account name in the Enter your name field and continue with Setup normally.
Reference
https://www.tomshardware.com/how-to/install-windows-11-without-microsoft-account