Just to add, after your 90 days is up you can fly to a neighbouring country, get another 60 day TV and repeat! Dont rely on that for too long though .....
Well i just got some insurance from UK, decent and cheap at £130.00 for 3 months BUT to get the Thai Pass you need a concise document with info all there (coverage ampunt $
*****
+, counties covered, mention of covid cover, name. BUT my insurance sent me 4 pdfs of various lengths none of which had all that info! Sp be careful, ive now got to call them and ask for a cover page containing the relevant info. If npt ill use a basic covid coverage from the one listed in the above comments....