Over at
https://marriagesabroad.dfa.ie/finprod/fmr301.xsp?t=1735236799610
a pop-up with a number of points appears. One of the points concerns Thailand
"Getting married in Thailand
Please note that if you getting married in Thailand, you should make direct contact with the Irish Embassy in Thailand or the Honorary Consulate in Phuket.
Contact details for the Embassy in Thailand and the Consulate in Phuket can be found here https://www.dfa.ie/embassies/irish-embassies-abroad/asia-and-oceania/thailand/"
Is this relevant in your case ?
( Looks like it was addded in 2022...........so might be changed since :( )
FWIW I'd try to establish voice contact with someone in either The Embassy or Consulate