I have heard various stories about Post Office deliveries both in the USA & England. It appears that there was a shortage of workers due to Covid in the varied sorting Offices over the Christmas period. Whilst some are quick to deliver others are extremely slow, as there is still a big back log..
I had a package sent from California to Manchester, England on Monday 4th January and I received it today Tuesday, 12th January.
Hoping that you package is just delayed because of a back log in a Sorting Office.