Oh you meant you can't get a visa in Jakarta if you're a non resident foreigner. You'll have to go to Thailand without a visa (if your nationality is on the list of the visa exempt, of course)
All PCR tests are RT-PCR, but the Thai authorities told their staff that people entering the kingdom should have a RT-PCR, so they expect the full name of the test to be written on the certificate as they are not medics.