A summary of the latest requirements for visitors to Thailand from 1 April:
  • All travellers — Thais and non-Thais — are not required to have fit-to-fly documents issued by Thai consulates
  • Foreigners, still have to show a negative COVID-19 test result.
  • People who are certified to have been vaccinated will be allowed to spend seven days in special quarantine hotels, compared to the previous 14 days. Acceptable certificates are those approved by Thai FDA and/or the World Health Organization
  • Unvaccinated people have to spend 10 days in quarantine unless they arrive from one of 11 countries — all in sub-Saharan Africa — in which case they have to do the full two weeks.

https://www.khaosodenglish.com/news/...or-vaccinated/

NB: Nothing there about the 100k travel insurance for tourists but I’d assume it’s still a requirement