USPS hubs/scans/package interceptions/love letters : CafeDread | Torhoo darknet markets

This is a shot in the dark/long shot, but does anyone have any insight into the package interception process? Specifically if more depths scans, searches of packages, etc. tend to happen at particular hubs?

I live in a major city (top 5 population wise) and have always wondered if my local post office has the capability to scan packages for suspect contents, or if it's generally a reassuring sign when it lands at your local post office.

Been at this for many years and have never had a run-in with LE, and try my best to buy from vendors who ship with standard opsec - package within a package, mylar, etc., but currently have a package that arrived at my local post office 4 days ago and hasn't moved since. Thankfully things have always worked out for me in these situations, I know USPS is a hot mess and dumb, unexplainable lag times happen on the regular. But even so, this current lag time is atypical and it's difficult to not wonder what the fuck is going on.

And yes, feel free to tell me to deep fry my harddrive, clean house, kill my dog who witnessed me doing drugs and then burn my house down, just to be safe. Y'know, the usual.