Worth a read to clarify some of the system requirements
FWIW this morning to my surprise, it decided to ignore the TPM 2.0 requirement (or any TPM at all for that matter) and download and install W11.
So this statement "In support of the Windows 11 system requirements, we’ve set the bar for previewing in our Windows Insider Program to match the minimum system requirements for Windows 11, with the exception for TPM 2.0 and CPU family/model." from the linked page appears to be incorrect.