@Khun *****
here is the relevant text from the official publication in the Royal Gazette:
(1) Foreigners who wish to reside in Thailand for tourism and remote work include foreigners who wish to travel to Thailand for long-term tourism, foreigners who wish to travel to Thailand for remote work, such as highly skilled groups, self-employed groups, remote work groups, or foreigners who wish to reside in Thailand for other activities such as learning Muay Thai and martial arts, learning to cook, learning and practicing sports, medical treatment, training, seminars, art and music performances."