Joined the Insider Program a month ago and it advised that the PC was not up to Spec for Win11 and I would only receive Win 10 previews.
Both of the above hardware items confirm this.
Today doing a check for Windows Updates apart from the usual security updates for Win 10, Windows 11 Insider Preview 10.0.22000.100 (co_release) was on the list with no option to refuse it's installation.
It is now downloading.
Not a problem but I was surprised that the download is available on this spec of machine.