Same thing will happen with your phone. If UPS says it'll be there tomorrow, it will. The iPhones travel together on pallets between hubs and don't always get scanned.
my iPhone 6s plus is stuck in Philadelphia since the 22 and has not departed and now it says delivery date unknown it's going to Lehigh valley pa I'm worried since there no additional scans. I called apple they want me to wait and ups want to file an investigation but they can't what can I do
Mine is also in Philadelphia and says Scheduled delivery information is not available at this time. Please check back later. Your phone has taken exactly the same route as mine.
I'm not that worried about it. Probably just a temporary blackout on information as the package moves through the system.