and just like that we're done. As we can see from this image that
@J**
had messaged me back on July 26th (which I redacted) they are indeed on an extension of stay NOT a Non-B VISA :( and it was indeed issued from Bangkok.
So that means unless they come back to bangkok to cancel it they aren't gonna be able to get a 60 day covid extension at ANY immigration office.
No office that I know of will do anything covid extension wise on an "open" <-(uncancelled) extension of stay.
Terminology is everything people, READ your stamps, know the difference between a VISA and and extension of stay.
Good luck to the O/P.