Hi,
I'm Sumit, here to help with your query on the Microsoft Q&A forums.
Apologies for any inconvenience you are experiencing. I am happy to help you today.
Yes, Microsoft removed the unsupported TPM (i.e., 1.2) and the Unsupported processor guide. They recommend that older Processors should not upgrade as of now, while they did not explicitly state that why the document was updated.
As of now, if you have TPM 2.0 and an unsupported Processor like a 7th-generation one, the upgrade proceeds. You can do that on your own risk.
I hope you find this information useful. If you have any more questions, don't hesitate to reach out. Otherwise, please take a moment to rate the thread. Wishing you good luck!