I think IMHO Thailand pass, is not for tourists.
First I did the homework by arranging all the required paperwork.
printed it out on paper and scanned them as JPEG’s.
Used Chrome instead of Safari as advices on this site.
Filling in the application costs me less then 15 minutes.
Two hours later I got my approval via mail and printed it out.
let me test 72 hours before arrival with a negative result and jumped on the plane.
Arrival at Suvarna was smooth sailing. Passport check took 5 minutes, they only wanted to see my passport, T6 form, Thailand pass and the result of my negative test. The longest wait was for my suitcase.
Got a new PCR test in the hotel and the next morning I was on my way to Si Sa Ket.
There were a lot of hoops and hassle but eventually I got to my destination as I planned.
Test & Go worked for me, but with this amount of hurdles it is not for tourists