ah I see, point is you mentioned you were enquiring for the test for your “visa”, but confusing as you need 2 tests. Try Thai travel clinic for your tests. Swab in the morning, results emailed the same evening, pick up cert the next day after 9am
the charter flight checks the validity within 72hrs upon ARRIVAL to PNH, doesn’t matter what is noted elsewhere, the airline staff at check in handles and checks that you are within 72hrs of arrival to PNH airport
For your visa application it’s fairly easy no?, it’s only for your flight where you need to watch the timing a bit. For your visa just get the results and go to the embassy the next day