Hmmmm, perhaps, given the lockdown situation in China, the DHL - UPS, logistics firms may still be operating - moving things around - simply in smaller quantities - - thereby slower. Then, with those lockdown restrictions in place, - they're unable to have all their staff on site - to scan items at each point. So, items are simply moving without being tracked - at a pace that doesn't require a lot of personal, and even those working - to do so every day for a limited number of hours. In essence - the equipment is crawling along at a snail pace. Then, once the item arrives at a destination country with a different environment, - they're able then to scan the items to allow transparancy of the movement of the item till its delivery!
Patience - patience, and hope Apple would gift everyone impacted by the delays some gesture of goodwill! Wishful thinking!