eBay shipping concerns

Hi all! I ordered a doll (Victoria to be exact) from eBay on February 25th, and its estimated arrival date was between March 10th and 23rd.

It's currently the 21st, and I've been keeping up with the tracking, but it's been in limbo since March 9th, with 'Arrived within destination country' as the last update. For context, I live in New Zealand, and the doll was shipped from the US using USPS.

I'm not going to worry before the 23rd (or 24th), but just in case it's late, is there anything I can do to figure out what's going on or why it's been stuck in one place for so long? I'm a new collector and ordering from eBay by myself for the first time 😅