I can confirm this, here is my ongoing story.
Myself and my two sons went to the UK for a month, tested positive with ATK in UK, two weeks later we all tested negative by PCR for fit to fly back to Bangkok. We arrived in Bangkok evening 24th and straight to hotel for PCR tests, Eventually get the results at 3pm on 25th. I showed as positive, eldest son showed as Equivocal, youngest son negative. I eventually get them to accept home quarantine but before they send the transport I must deposit 20,000 Baht to the hospital, I contacted my insurance who said they will not cover me as I have no symptoms. I get the 20k down to 10 and transfer and they send a van to send me home.
In the mean time I talk on the phone with the hospital and ask what the money is for, I am told for medicine to cure my covid (yes this is what she said) and for a Dr to call me daily to check my symptoms.
Anyway a Dr called on 26th, asked how I am, I told her the same as the previous day, nothing wrong with me, she agreed that I am not infectious (never met me or examined me) and said she will release me from home quarantine on 31st, and she would send medicines and food, I refused meds, she sent a thermometer, an oxy reader, some masks and bin bags, also food has arrived that I reject as I wouldn't feed it to my dog.
I have had no more calls, they chat to me via Line app.
Long story short for my 10k I have a thermometer, oxy reader, masks and bin bags and one Dr call, and a van home (10km),
Thankfully my insurance have now agreed that as I am home quarantine they will class it as an OPD every day and will cover, so fingers crossed I get my 10k back, or what could have been 20k if I hadn't stood firm.
Imagine being a tourist, strange country/language, no home to do house quarantine, an insurance company that decides they wont cover asymptomatic.
Absolute joke.