Emulating a physical TPM doesn't always help when you cannot get a valid certificate signed by AMD/Intel. These are stored on the TPM and cannot be easily dumped. You'll want to passthrough your PC's TPM to the VM rather than emulating one.

https://www.reddit.com/r/linux_gaming/comments/1mkb3s8/under... talks about an example of a timing check that games use to detect running in VMs. There's additional checks besides this, but give you an example of how it's possible to block VMs.