Does your PC meet the requirements or it didn't and you're still able to join the Dev channle. Mine doesn't and I can only join the Release preview - as expected
I said this in the other thread but repeating here; TPM "required" is likely to be purely due to the existence of features like Bitlocker or Hello. Non essential things. Not the base OS.
A lot of people are focusing on the TPM requirement, but I'm more concerned about the processor requirement. Astonishing that Core 6th and 7th gen are also excluded. Mine is a 7th gen 2.8Ghz CPU - way above the 1GHz specified in the specifications. I guess the requirements will need to be hacked.
The hard floor requirements are different from the soft floor, any recent(even not so recent) CPUs will be able to run and install Windows 11.
People do this a lot. There is a registry setting that you can change the build number. People change the theme to make it look futuristic. My guess is they modded the existing leak and took a screenshot.