Not necessarily. iMessage & FaceTime AFAIK are cryptographically locked onto Apple HW. I could be wrong, but my understanding is that each piece of Apple HW ships with a burned in unique private key that Apple records the public key of in it's internal database. That private key would be missing in a VM context.

It's possible my data is out of date though because iMessage spam is real & I'm not sure how that's done if it needs a valid private key that Apple can ban.