Click on the examples below of late and/or unscanned packages which were eventually delivered.
This package was both delayed and never updated until the day it reached the destination facility.
This priority mail package showed no scans for 7 days mid-route but was eventually delivered.
No scan until reached destination facility
I could provide an endless list but you get the picture.
The post office doesn't always scan every package at every step -- as you can see from the examples above.
The postal system is overwhelmed and delays should be expected during the pandemic. It is run by humans who are getting sick from the virus too. Additionally, limited flights means your package may not reach its next destination as quickly.
Delivery estimates are only that -- estimates, not guarantees. This was also noted at checkout:
Please be patient. Most questions resolve themselves in a few days, some may take a few weeks. 99% of all packages are delivered safely, even if they may be delayed or failed to scan.
- Ship from address is 25A Crescent Dr 208, Pleasant Hill CA 94523