Your device is not in the Beta channel, perhaps in the Release Preview, since the latest Beta build is 22635.4870.
There is plenty of information on how to change channels in Insider in this Community.
Your issue is an example of an inconsistency in Windows 11. As far as I know, in the Beta, Canary and Dev channels, computers that do not meet the minimum requirements are not allowed, but that is not the case in the Release Preview channel or in the Public version.
Maybe tomorrow or another day Windows will block these latest versions and not allow them to run on computers that do not meet those minimum requirements, but that is another issue, especially since we have verified that the computers excluded by Microsoft as eligible for Windows 11 are perfectly capable, at least some of them, of running this version.