First off, this is trademark, copyright. Second, merely registering a trademark doesn't get you this level of treatment from CBP; Apple pays them significantly

First off, this is trademark, copyright. Second, merely registering a trademark doesn't get you this level of treatment from CBP; Apple pays them significantly more money in order to be able to tell them how they want their trademark enforced at the border. Third, when your shit gets seized by CBP, that's based purely on the allegations of Apple; there's no due process (like there would be with, say, an ITC patent action). Keep in mind here: the products in question are not counterfeit. If Apple had to sue to get the parts taken out of the market, they would lose, because of very obvious exceptions to trademark law - e.g. official Apple flex cables don't stop being official Apple flex cables when you plug a third-party iPhone screen into them. That would be like, if I sold you a Samsung TV, but I had an Apple HDMI cable hanging off the back of it, and then Apple sued me saying that I was selling a counterfeit Apple TV because the HDMI cable had an Apple logo on it.