Be concerned.
Same thing happened when I shipped a VW transaxle from UK to New Hampshire. Tracking showed it at Manchester (NH, US) UPS terminal. For days. Finally, I went there.
They couldn't find it.
Baffled.
Finally, as I was leaving, they said:
"Waaaaait.... what was in the package?"
"Transaxle"
"Come out back, look at this"
Laying on the concrete floor at the edge of a busy terminal, was a mangled, broken lump. VW GGB transaxle. No box. No skid. No foam. No paperwork. No UPS label.
Nothing.
Bell housing cracked.
Rear housing cracked.
CV joint heat shield broken off.
I had paid $200 to a shipping firm to collect it from the breaker, and properly crate it, which they did, I have images.
UPS refused the claim, citing the packaging material didn't bear the US certification for burst strength. I contended that the images I had showed the EU equivalent on the packaging. Nope.
They suck. A lot.