Most people seem to have missed the reported fact that a security researcher now working as an executive at Grayshift was previously an employee at Apple. The exploit being used in the GrayKey device may have been exported directly from within Apple's walls. Perhaps this man was involved enough with iOS security that he a) built in a backdoor; or b) discovered a vulnerability, and instead of disclosing it, left Apple to profit off the exploit; or c) gained enough knowledge of the systems to be able to reverse engineer an exploit from scratch, after leaving Apple.

The fact that the company producing the GreyKey has an executive who is a security researcher and used to work for Apple is such an obvious, damning piece of evidence. I don't understand why this connection hasn't been more widely reported and investigated.