I was approved today after 5 full business days in Hanoi. Workation (English online teacher) screenshots of me teaching, teacher profile with appointments, bank statements of payment for the last year, US citizen, cashapp(not a bank) account with 6 month statements over 500k requirement, no cover letter nor letter explaining what I do. Copy of vietnam evisa, copy of stamp on passport, copy of Apartment lease. No extra documents required just straight approval. Good luck to all 👍