Same here also. The first time I ran the PC Health Check Tool it told me on one PC that my system hadn't got TPM 2.0 enabled (true, it was turned off in BIOS) and therefore wouldn't be able to run Windows 11. Figuring out what the hell I needed to do in the BIOS to get it turned on was maddening. I think I had to take something like 4 or 5 progressive steps before I could get at the option to enable Intel PTT (= TPM 2.0 for my machine) - thanks Gigabyte!
I have since enabled TPM 2.0 on 2 of my 3 machines, with one signed up to the Dev channel and my usual PC on Beta channel. The other is just a backup in case something goes badly wrong and I'm too thick to figure it out.
The email doesn't tell me anything about which PC its referring to or when they are pulling the info from (by the time the mail was sent both insider machines were Windows 11 capable and the Dev one had 11 downloaded and installed)