Its 4 days after submission of PP... I was expecting for the USPS return tracking to be activated today.. but still not
Timeline:
Applied Online: 31 May
PP Request: 21 Jun
PP sent to LA: 21 Jun
PP received at LA: 24 Jun

Timeline:
Applied Online: 31 May
PP Request: 21 Jun
PP sent to LA: 21 Jun
PP received at LA: 24 Jun