“Following a years-long battle with Corellium, Apple has been told by US courts that third-party virtual iOS devices are indeed allowed and that there’s nothing it can do to put an end to that.”
The Eleventh Circuit ruled Corellium’s virtual iPhones are fair use. Apple tried to buy Corellium in 2018, failed, and then sued it for years. Corellium sells to security researchers, federal agencies and defense contractors. Apple wanted one legal way to run iOS: on hardware it sells you.