https://thaiembdc.org/2020/12/10/stv/ states:

 

Quote

5.2 Medical certificate with a laboratory result indicating that COVID -19 is not detected, using RT-PCR test, issued no more than 72 hours before departure

 

I have a COVID-19 test reports that says "Methodology: Nucleic Acid Amplification Test (NAAT): RT-PCR or TMA;(Hologic Panther System)". Will I be denied boarding because my COVID-19 test report doesn't state that the test is necessarily RT-PCR but could be TMA instead?

Probably depends on the check in agent, but I wouldn't be risking it.

In another thread you mentioned you were flying on 17th March - why so early with the test, just a trial run?