Good evening, I want to ask why my order has been stuck for 15 days? Is there a problem? Please let me know. Thank you very much

Που είναι το πακετο μου με αριθμό LL171123080CN ?? Το έχω παραγγείλει από 13.4.2019

Tracking AM709506725CN package from DHGATE
On dhgate tracking it says has arrived in the us and is at JFK but says export customs clearance? Is that normal? Also is it normal to not have movement after this? First time doing dhgate. Thank you!