What travel COVID insurance is preferred for USA passport holders to enter Thailand, and how can one extend their stay to 90 days?

USA passport holders are seeking preferred travel COVID insurance for entry into Thailand that meets the Thai Pass requirements, with SafetyWing mentioned as a potential option. It's important to be aware that home country insurance may not cover asymptomatic conditions, leading to potential high costs in case of quarantine. Luma Thai Pass insurance is mentioned as a valid choice, costing around ฿3,100. Additionally, guidance is sought on extending their stay to 90 days.