I remember that my USPS status showed , not yet picked or something similar (I did AOS back in 2020 April), for more than a week, but it was indeed picked. I got the notification of money being charged and received my NOA too shortly afterwards. I was concerned to say the least and even opened a ticket with USPS. Ths USPS status didn't change even after a few weeks, although I had my NOA in the hand.