I figured it already was on 11 since they've added it to 10 also recently. You can at least turn it off pretty easily in 10 (though IDK if that's just because I have Pro; didn't need to use the GPM so I assume Home can disable it too).
Could you, like... Disable TPM in the BIOS and just go back to 10? The only reason it hasn't auto-updated to 11 for me is because I never enabled TPM in my BIOS. And I don't plan on doing so, either.