Today it's official there are no insurers will cover the quarantine if you tested positive covid asymptomatic. It must need the medical necessary only.
All new TEST & GO applications must submit A proof of prepayment for 2 separate nights of accommodation at government-approved hotel/s, such as, SHA Extra Plus (SHA++), AQ, OQ, or AHQ on Day 1 and Day 5, and the expenses for 2 RT-PCR tests on Day 1 and Day 5. The prepayment for Day 1 must include an accommodation, a test and a prearranged transfer from the airport to the hotel.
Travellers can book 2 different hotels for the accommodation on Day 1 and Day 5. However, on both Day 1 and Day 5, they must stay within the room for the RT-PCR test result.
A SHA ++ hotel mean this hotel has a private hospital agreement for both test and quarantine
yes my friend used this policy for his Thailand Pass (TP) only three months ago google Sainsbury’s travel insurance and there’s a phone number you can phone and ask any questions you have regarding quarantine, covid Asymptomatic good luck
Give SCB bank a try and if unsuccessful try another SCB bank or Bangkok Bank just don’t take no for an answer it would be good if you had a Thai girlfriend with or if you are desperate try a Agency they can help you for a fee good luck