Yes, I am an actual technician. Apple can remove it. It’s called a FMIL removal. You just need to provide POP (proof of purchase) and it goes off to the activation lock team.
However, it is not possible for Apple to have accidentally added or “fat fingered” the “wrong IMEI or serial number to the wrong Apple ID”. There is no way to remotely add and turn on “find my iPhone” to an Apple ID. By the consumer or by Apple. Just like when people lose their phone or if it’s stolen they want to be able to locate it but, they never turned on Find my iPhone....there is no way for them to turn it on remotely or after the fact. So, if they didn’t have it turned on and their phone was stolen...then they are SOL.
Someone absolutely had to of signed into that Apple ID that you did not recognize at some point from that specific device itself. THIS IS THE ONLY WAY. Apple can’t even do it remotely. This I can ABSOLUTELY assure you. While I am not allowed to say who I work for I can assure you that they could not have been the ones who did it.
Additionally, it is not possible to remotely “hack” an iPhone. Apple’s encryption process is out of the world. The only way to obtain information “remotely” is to 1. Download a 3rd party app like Dog watch or something OR 2. through the Apple ID in which case you’d have to know the Apple ID password.
Apple has NO backdoor. If you don’t know what that is then I will explain it like this: think of a brick house...if there are NO doors or windows then there’s no way to get in. That’s an Apple product. That’s why Apple refused when the FBI wanted apple to create the backdoor similar to any Android or Windows PC product. PC Has a backdoor, which is why they’re so vulnerable to real true “hacking”, adware, malware and even just garbage. Think of their “houses” having doors and windows. They might be secured with locks or “alarm systems” BUT someone can still break a “windows” or kick in a door.
This is precisely why Apple DOES NOT and WILL NOT ever, ever, ever create the backdoor. Their customers privacy and security is taken very seriously. So much so that even the ownerthemselves can get locked out. I know I would much rather own Apple products over any other company ANY DAY! If it’s tough for me to get into my own products if I FORGET MY PASSWORDS etc...then I know Apple is someone to trust and respect. You have to be able to prove that you’re the one who purchased that device and then, they are more than happy to remove the FMIL from that said device.