Sometime I do not receive a complete update on USPS shipping on Etsy. When I see that, I would click on the bottom of the “Track Package” window showing the tracking number in blue. This link will take me directly to the USPS Tracking page. Occasionally, I will see the tracking information more up to date.
When all fails, same with Katy, I know the ordered arrived when I get a review from a customer or do not hear from a customer.