Hello,
I'd like to share my passport application timeline as might be useful for comparison as a new data point.
2/18 applied in USPS for card and passport book. Paid for both ways express and expedited.
2/22 In process with locator number "69".
3/8 Approved
3/9 Mailed with a USPS tracking number
3/10 Received a old gen. passport book in mail.
One thing I noticed is that once the status changed from "Approved" to "Mailed", they provided me with the USPS tracking number, but later on after 5-6 hours, when I checked it had changed back to "Approved" and still is. So Basically, it might be a system glitch, but looks like they share the tracking number and if you don't see it by chance, you'll assume it used to be "Approved" and still is "Approved" although in the meantime it had already one change.