Apple created the hardware and software so that they cannot access the encryption keys. You can choose not to believe it if you wish, but there is no evidence to support that.
I’m sorry, then. I don’t understand the tech. My bad. I thought Apple COULD unlock the phone but it would potentially unlock ALL phones and iPhones would no longer be encryption protected. And that there was no legal way to force them to, anyway.
I believe that a compromise solution will be found one day.