The whole experience leaving out of Tân Sơn Nhất Airport was quite underwhelming.
Very little traffic dropping people off at Terminal 2 (International departures).
In the right end of the terminal, there were only a few check in lines open; all Singapore Airlines.
All shops are closed, and some key escalators were turned off, so I used elevators instead.
Currency exchange booths were also unmanned.
Security guards at the entrance to the terminal might stop you if there's a lot of people in your group.
They really only want ticketed passengers to pass through the doors, but it's a very loose enforcement.
The need to show covid-19 test results is based solely on your country destination and the airline. As far as I know Ho Chi Minh city has still not instituted any special test requirements for being able to access the airport.
NOTE: If you are connecting through Singapore, even if you are remaining at the airport to wait, the country now requires ALL arrivals to have been tested within the previous 72 hours.
Meanwhile, I made it back to America.
Still in route to New Orleans.