Yes, and from there it goes to post offices and waystations. The photo scanning does not take place when the mail comes in and again when it goes out, it only happens on intake. So it can just disappear after that at the final sorting center if it doesn’t have a tracking number.
I’m fully aware of how the system works....there is not a FINAL sorting center....there is one. Can something happen after it leaves the sorting center? I suppose..but that mail is transported by contract employees, not usps employees ..but you claimed carriers are routinely stealing mail. Has it happened , yes. Do packages get lost from UPS, FedEx, and Amazon ? Yes. Do they get investigated? Yes. Not everything is a conspiracy