On November last year I was in Miami (on a tourist B1/B2 visa) and got 2 PCR tests (in 2 different locations) plus 1 Antigen test offered by the state, totally free of charge.
Got the results pretty quickly too.
The bumrungrad moderna registration is for first or second quarter next year, so probably not coming this year after all.
Other 2 hospitals I registered with confirmed the same revised schedule.
Luckily I got my pfizer from expatvac.