Developer claims to have jailbroken iPhone XS Max
The customization options in Apple could be said to be limited compared to those of Android. This may be addressed (well, somewhat) through jailbreaking. This process gives slightly more access to the iOS system, although it is frowned upon by Cupertino developers.
Luca Tudesco, a name commonly linked to jailbreaking, has indicated that he has successfully jailbroken one of Apple's newest flagships. He sent one Tweet including the phrase, "...now I'm done hacking the iPhone XS Max...", to which a follower replyed asking for confirmation that Tudesco was referring to jailbreaking in the phone. The reply was: "I have jailbroken the A12, yes, and I am running stock now".
This suggests that Tudesco's iPhone XS Max had indeed been jailbroken. On the other hand, it is not the only phone powered by Apple's A12 bionic chip. This makes the Tweet just slightly ambiguous. Then again, the Pangu group went public some time ago with claims that iOS 12 was in fact hackable in this way.
However, neither of these claims has resulted in the release of jallbreaking methods or resources. Therefore, people wishing to hack their own iPhone XS Maxes in this way may have yet more of a wait on their hands.