From
Microsoft:
Insider W11 builds can be installed on systems that don't meet the requirements, which is what you have been seeing.
At final release we will enforce the requirements for new installs. Any existing insider W11 install will not be changed to final release if requirements are not met (nor will those machines get any updates) - we recommend you roll back to Windows 10.
W11 at final release will require Internet to install and file verification will take place. You will be unable to bypass the system requirement checks.
https://mobile.twitter.com/tomwarren/status/1408770930818572292