Update: I received my K1 Visa/Passport on May 4, 2023! Mèsi, Jezi!
I was notified by email From: no-reply@ustraveldocs.com and the subject line was Document Status (US Travel Docs)
It will say: "Your document(s) have been collected from the US Embassy/Consulate" and other information regarding where to pick up and fees.
Before you go to DHL, please go to the bank and pay the $18.50 Fee.
After payment, Go to the DHL location but make sure to bring with you:
Receipt of the payment fee
Email from US Travel Docs
Passport (Photo-Copy)
Appointment Confirmation (Photo-Copy)
Tout laglwa pou Bondye!